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How to prepare and deliver an effective oral presentation

• Related content
• Peer review
• Lucia Hartigan , registrar 1 ,
• Fionnuala Mone , fellow in maternal fetal medicine 1 ,
• Mary Higgins , consultant obstetrician 2
• 1 National Maternity Hospital, Dublin, Ireland
• 2 National Maternity Hospital, Dublin; Obstetrics and Gynaecology, Medicine and Medical Sciences, University College Dublin
• luciahartigan{at}hotmail.com

The success of an oral presentation lies in the speaker’s ability to transmit information to the audience. Lucia Hartigan and colleagues describe what they have learnt about delivering an effective scientific oral presentation from their own experiences, and their mistakes

The objective of an oral presentation is to portray large amounts of often complex information in a clear, bite sized fashion. Although some of the success lies in the content, the rest lies in the speaker’s skills in transmitting the information to the audience. 1

Preparation

It is important to be as well prepared as possible. Look at the venue in person, and find out the time allowed for your presentation and for questions, and the size of the audience and their backgrounds, which will allow the presentation to be pitched at the appropriate level.

See what the ambience and temperature are like and check that the format of your presentation is compatible with the available computer. This is particularly important when embedding videos. Before you begin, look at the video on stand-by and make sure the lights are dimmed and the speakers are functioning.

For visual aids, Microsoft PowerPoint or Apple Mac Keynote programmes are usual, although Prezi is increasing in popularity. Save the presentation on a USB stick, with email or cloud storage backup to avoid last minute disasters.

When preparing the presentation, start with an opening slide containing the title of the study, your name, and the date. Begin by addressing and thanking the audience and the organisation that has invited you to speak. Typically, the format includes background, study aims, methodology, results, strengths and weaknesses of the study, and conclusions.

If the study takes a lecturing format, consider including “any questions?” on a slide before you conclude, which will allow the audience to remember the take home messages. Ideally, the audience should remember three of the main points from the presentation. 2

Have a maximum of four short points per slide. If you can display something as a diagram, video, or a graph, use this instead of text and talk around it.

Animation is available in both Microsoft PowerPoint and the Apple Mac Keynote programme, and its use in presentations has been demonstrated to assist in the retention and recall of facts. 3 Do not overuse it, though, as it could make you appear unprofessional. If you show a video or diagram don’t just sit back—use a laser pointer to explain what is happening.

Rehearse your presentation in front of at least one person. Request feedback and amend accordingly. If possible, practise in the venue itself so things will not be unfamiliar on the day. If you appear comfortable, the audience will feel comfortable. Ask colleagues and seniors what questions they would ask and prepare responses to these questions.

It is important to dress appropriately, stand up straight, and project your voice towards the back of the room. Practise using a microphone, or any other presentation aids, in advance. If you don’t have your own presenting style, think of the style of inspirational scientific speakers you have seen and imitate it.

Try to present slides at the rate of around one slide a minute. If you talk too much, you will lose your audience’s attention. The slides or videos should be an adjunct to your presentation, so do not hide behind them, and be proud of the work you are presenting. You should avoid reading the wording on the slides, but instead talk around the content on them.

Maintain eye contact with the audience and remember to smile and pause after each comment, giving your nerves time to settle. Speak slowly and concisely, highlighting key points.

Do not assume that the audience is completely familiar with the topic you are passionate about, but don’t patronise them either. Use every presentation as an opportunity to teach, even your seniors. The information you are presenting may be new to them, but it is always important to know your audience’s background. You can then ensure you do not patronise world experts.

To maintain the audience’s attention, vary the tone and inflection of your voice. If appropriate, use humour, though you should run any comments or jokes past others beforehand and make sure they are culturally appropriate. Check every now and again that the audience is following and offer them the opportunity to ask questions.

Finishing up is the most important part, as this is when you send your take home message with the audience. Slow down, even though time is important at this stage. Conclude with the three key points from the study and leave the slide up for a further few seconds. Do not ramble on. Give the audience a chance to digest the presentation. Conclude by acknowledging those who assisted you in the study, and thank the audience and organisation. If you are presenting in North America, it is usual practice to conclude with an image of the team. If you wish to show references, insert a text box on the appropriate slide with the primary author, year, and paper, although this is not always required.

Answering questions can often feel like the most daunting part, but don’t look upon this as negative. Assume that the audience has listened and is interested in your research. Listen carefully, and if you are unsure about what someone is saying, ask for the question to be rephrased. Thank the audience member for asking the question and keep responses brief and concise. If you are unsure of the answer you can say that the questioner has raised an interesting point that you will have to investigate further. Have someone in the audience who will write down the questions for you, and remember that this is effectively free peer review.

Be proud of your achievements and try to do justice to the work that you and the rest of your group have done. You deserve to be up on that stage, so show off what you have achieved.

Competing interests: We have read and understood the BMJ Group policy on declaration of interests and declare the following interests: None.

• ↵ Rovira A, Auger C, Naidich TP. How to prepare an oral presentation and a conference. Radiologica 2013 ; 55 (suppl 1): 2 -7S. OpenUrl
• ↵ Bourne PE. Ten simple rules for making good oral presentations. PLos Comput Biol 2007 ; 3 : e77 . OpenUrl PubMed
• ↵ Naqvi SH, Mobasher F, Afzal MA, Umair M, Kohli AN, Bukhari MH. Effectiveness of teaching methods in a medical institute: perceptions of medical students to teaching aids. J Pak Med Assoc 2013 ; 63 : 859 -64. OpenUrl

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Open Access

Ten simple rules for effective presentation slides

* E-mail: [email protected]

Affiliation Biomedical Engineering and the Center for Public Health Genomics, University of Virginia, Charlottesville, Virginia, United States of America

• Kristen M. Naegle

Published: December 2, 2021

• https://doi.org/10.1371/journal.pcbi.1009554
• Reader Comments

Citation: Naegle KM (2021) Ten simple rules for effective presentation slides. PLoS Comput Biol 17(12): e1009554. https://doi.org/10.1371/journal.pcbi.1009554

Copyright: © 2021 Kristen M. Naegle. This is an open access article distributed under the terms of the Creative Commons Attribution License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Funding: The author received no specific funding for this work.

Competing interests: The author has declared no competing interests exist.

Introduction

The “presentation slide” is the building block of all academic presentations, whether they are journal clubs, thesis committee meetings, short conference talks, or hour-long seminars. A slide is a single page projected on a screen, usually built on the premise of a title, body, and figures or tables and includes both what is shown and what is spoken about that slide. Multiple slides are strung together to tell the larger story of the presentation. While there have been excellent 10 simple rules on giving entire presentations [ 1 , 2 ], there was an absence in the fine details of how to design a slide for optimal effect—such as the design elements that allow slides to convey meaningful information, to keep the audience engaged and informed, and to deliver the information intended and in the time frame allowed. As all research presentations seek to teach, effective slide design borrows from the same principles as effective teaching, including the consideration of cognitive processing your audience is relying on to organize, process, and retain information. This is written for anyone who needs to prepare slides from any length scale and for most purposes of conveying research to broad audiences. The rules are broken into 3 primary areas. Rules 1 to 5 are about optimizing the scope of each slide. Rules 6 to 8 are about principles around designing elements of the slide. Rules 9 to 10 are about preparing for your presentation, with the slides as the central focus of that preparation.

Rule 1: Include only one idea per slide

Each slide should have one central objective to deliver—the main idea or question [ 3 – 5 ]. Often, this means breaking complex ideas down into manageable pieces (see Fig 1 , where “background” information has been split into 2 key concepts). In another example, if you are presenting a complex computational approach in a large flow diagram, introduce it in smaller units, building it up until you finish with the entire diagram. The progressive buildup of complex information means that audiences are prepared to understand the whole picture, once you have dedicated time to each of the parts. You can accomplish the buildup of components in several ways—for example, using presentation software to cover/uncover information. Personally, I choose to create separate slides for each piece of information content I introduce—where the final slide has the entire diagram, and I use cropping or a cover on duplicated slides that come before to hide what I’m not yet ready to include. I use this method in order to ensure that each slide in my deck truly presents one specific idea (the new content) and the amount of the new information on that slide can be described in 1 minute (Rule 2), but it comes with the trade-off—a change to the format of one of the slides in the series often means changes to all slides.

• PPT PowerPoint slide
• PNG larger image
• TIFF original image

Top left: A background slide that describes the background material on a project from my lab. The slide was created using a PowerPoint Design Template, which had to be modified to increase default text sizes for this figure (i.e., the default text sizes are even worse than shown here). Bottom row: The 2 new slides that break up the content into 2 explicit ideas about the background, using a central graphic. In the first slide, the graphic is an explicit example of the SH2 domain of PI3-kinase interacting with a phosphorylation site (Y754) on the PDGFR to describe the important details of what an SH2 domain and phosphotyrosine ligand are and how they interact. I use that same graphic in the second slide to generalize all binding events and include redundant text to drive home the central message (a lot of possible interactions might occur in the human proteome, more than we can currently measure). Top right highlights which rules were used to move from the original slide to the new slide. Specific changes as highlighted by Rule 7 include increasing contrast by changing the background color, increasing font size, changing to sans serif fonts, and removing all capital text and underlining (using bold to draw attention). PDGFR, platelet-derived growth factor receptor.

https://doi.org/10.1371/journal.pcbi.1009554.g001

Rule 2: Spend only 1 minute per slide

When you present your slide in the talk, it should take 1 minute or less to discuss. This rule is really helpful for planning purposes—a 20-minute presentation should have somewhere around 20 slides. Also, frequently giving your audience new information to feast on helps keep them engaged. During practice, if you find yourself spending more than a minute on a slide, there’s too much for that one slide—it’s time to break up the content into multiple slides or even remove information that is not wholly central to the story you are trying to tell. Reduce, reduce, reduce, until you get to a single message, clearly described, which takes less than 1 minute to present.

Rule 3: Make use of your heading

When each slide conveys only one message, use the heading of that slide to write exactly the message you are trying to deliver. Instead of titling the slide “Results,” try “CTNND1 is central to metastasis” or “False-positive rates are highly sample specific.” Use this landmark signpost to ensure that all the content on that slide is related exactly to the heading and only the heading. Think of the slide heading as the introductory or concluding sentence of a paragraph and the slide content the rest of the paragraph that supports the main point of the paragraph. An audience member should be able to follow along with you in the “paragraph” and come to the same conclusion sentence as your header at the end of the slide.

Rule 4: Include only essential points

While you are speaking, audience members’ eyes and minds will be wandering over your slide. If you have a comment, detail, or figure on a slide, have a plan to explicitly identify and talk about it. If you don’t think it’s important enough to spend time on, then don’t have it on your slide. This is especially important when faculty are present. I often tell students that thesis committee members are like cats: If you put a shiny bauble in front of them, they’ll go after it. Be sure to only put the shiny baubles on slides that you want them to focus on. Putting together a thesis meeting for only faculty is really an exercise in herding cats (if you have cats, you know this is no easy feat). Clear and concise slide design will go a long way in helping you corral those easily distracted faculty members.

Rule 5: Give credit, where credit is due

An exception to Rule 4 is to include proper citations or references to work on your slide. When adding citations, names of other researchers, or other types of credit, use a consistent style and method for adding this information to your slides. Your audience will then be able to easily partition this information from the other content. A common mistake people make is to think “I’ll add that reference later,” but I highly recommend you put the proper reference on the slide at the time you make it, before you forget where it came from. Finally, in certain kinds of presentations, credits can make it clear who did the work. For the faculty members heading labs, it is an effective way to connect your audience with the personnel in the lab who did the work, which is a great career booster for that person. For graduate students, it is an effective way to delineate your contribution to the work, especially in meetings where the goal is to establish your credentials for meeting the rigors of a PhD checkpoint.

Rule 6: Use graphics effectively

As a rule, you should almost never have slides that only contain text. Build your slides around good visualizations. It is a visual presentation after all, and as they say, a picture is worth a thousand words. However, on the flip side, don’t muddy the point of the slide by putting too many complex graphics on a single slide. A multipanel figure that you might include in a manuscript should often be broken into 1 panel per slide (see Rule 1 ). One way to ensure that you use the graphics effectively is to make a point to introduce the figure and its elements to the audience verbally, especially for data figures. For example, you might say the following: “This graph here shows the measured false-positive rate for an experiment and each point is a replicate of the experiment, the graph demonstrates …” If you have put too much on one slide to present in 1 minute (see Rule 2 ), then the complexity or number of the visualizations is too much for just one slide.

Rule 7: Design to avoid cognitive overload

The type of slide elements, the number of them, and how you present them all impact the ability for the audience to intake, organize, and remember the content. For example, a frequent mistake in slide design is to include full sentences, but reading and verbal processing use the same cognitive channels—therefore, an audience member can either read the slide, listen to you, or do some part of both (each poorly), as a result of cognitive overload [ 4 ]. The visual channel is separate, allowing images/videos to be processed with auditory information without cognitive overload [ 6 ] (Rule 6). As presentations are an exercise in listening, and not reading, do what you can to optimize the ability of the audience to listen. Use words sparingly as “guide posts” to you and the audience about major points of the slide. In fact, you can add short text fragments, redundant with the verbal component of the presentation, which has been shown to improve retention [ 7 ] (see Fig 1 for an example of redundant text that avoids cognitive overload). Be careful in the selection of a slide template to minimize accidentally adding elements that the audience must process, but are unimportant. David JP Phillips argues (and effectively demonstrates in his TEDx talk [ 5 ]) that the human brain can easily interpret 6 elements and more than that requires a 500% increase in human cognition load—so keep the total number of elements on the slide to 6 or less. Finally, in addition to the use of short text, white space, and the effective use of graphics/images, you can improve ease of cognitive processing further by considering color choices and font type and size. Here are a few suggestions for improving the experience for your audience, highlighting the importance of these elements for some specific groups:

• Use high contrast colors and simple backgrounds with low to no color—for persons with dyslexia or visual impairment.
• Use sans serif fonts and large font sizes (including figure legends), avoid italics, underlining (use bold font instead for emphasis), and all capital letters—for persons with dyslexia or visual impairment [ 8 ].
• Use color combinations and palettes that can be understood by those with different forms of color blindness [ 9 ]. There are excellent tools available to identify colors to use and ways to simulate your presentation or figures as they might be seen by a person with color blindness (easily found by a web search).
• In this increasing world of virtual presentation tools, consider practicing your talk with a closed captioning system capture your words. Use this to identify how to improve your speaking pace, volume, and annunciation to improve understanding by all members of your audience, but especially those with a hearing impairment.

Rule 8: Design the slide so that a distracted person gets the main takeaway

It is very difficult to stay focused on a presentation, especially if it is long or if it is part of a longer series of talks at a conference. Audience members may get distracted by an important email, or they may start dreaming of lunch. So, it’s important to look at your slide and ask “If they heard nothing I said, will they understand the key concept of this slide?” The other rules are set up to help with this, including clarity of the single point of the slide (Rule 1), titling it with a major conclusion (Rule 3), and the use of figures (Rule 6) and short text redundant to your verbal description (Rule 7). However, with each slide, step back and ask whether its main conclusion is conveyed, even if someone didn’t hear your accompanying dialog. Importantly, ask if the information on the slide is at the right level of abstraction. For example, do you have too many details about the experiment, which hides the conclusion of the experiment (i.e., breaking Rule 1)? If you are worried about not having enough details, keep a slide at the end of your slide deck (after your conclusions and acknowledgments) with the more detailed information that you can refer to during a question and answer period.

Rule 9: Iteratively improve slide design through practice

Well-designed slides that follow the first 8 rules are intended to help you deliver the message you intend and in the amount of time you intend to deliver it in. The best way to ensure that you nailed slide design for your presentation is to practice, typically a lot. The most important aspects of practicing a new presentation, with an eye toward slide design, are the following 2 key points: (1) practice to ensure that you hit, each time through, the most important points (for example, the text guide posts you left yourself and the title of the slide); and (2) practice to ensure that as you conclude the end of one slide, it leads directly to the next slide. Slide transitions, what you say as you end one slide and begin the next, are important to keeping the flow of the “story.” Practice is when I discover that the order of my presentation is poor or that I left myself too few guideposts to remember what was coming next. Additionally, during practice, the most frequent things I have to improve relate to Rule 2 (the slide takes too long to present, usually because I broke Rule 1, and I’m delivering too much information for one slide), Rule 4 (I have a nonessential detail on the slide), and Rule 5 (I forgot to give a key reference). The very best type of practice is in front of an audience (for example, your lab or peers), where, with fresh perspectives, they can help you identify places for improving slide content, design, and connections across the entirety of your talk.

Rule 10: Design to mitigate the impact of technical disasters

The real presentation almost never goes as we planned in our heads or during our practice. Maybe the speaker before you went over time and now you need to adjust. Maybe the computer the organizer is having you use won’t show your video. Maybe your internet is poor on the day you are giving a virtual presentation at a conference. Technical problems are routinely part of the practice of sharing your work through presentations. Hence, you can design your slides to limit the impact certain kinds of technical disasters create and also prepare alternate approaches. Here are just a few examples of the preparation you can do that will take you a long way toward avoiding a complete fiasco:

• Save your presentation as a PDF—if the version of Keynote or PowerPoint on a host computer cause issues, you still have a functional copy that has a higher guarantee of compatibility.
• In using videos, create a backup slide with screen shots of key results. For example, if I have a video of cell migration, I’ll be sure to have a copy of the start and end of the video, in case the video doesn’t play. Even if the video worked, you can pause on this backup slide and take the time to highlight the key results in words if someone could not see or understand the video.
• Avoid animations, such as figures or text that flash/fly-in/etc. Surveys suggest that no one likes movement in presentations [ 3 , 4 ]. There is likely a cognitive underpinning to the almost universal distaste of pointless animations that relates to the idea proposed by Kosslyn and colleagues that animations are salient perceptual units that captures direct attention [ 4 ]. Although perceptual salience can be used to draw attention to and improve retention of specific points, if you use this approach for unnecessary/unimportant things (like animation of your bullet point text, fly-ins of figures, etc.), then you will distract your audience from the important content. Finally, animations cause additional processing burdens for people with visual impairments [ 10 ] and create opportunities for technical disasters if the software on the host system is not compatible with your planned animation.

Conclusions

These rules are just a start in creating more engaging presentations that increase audience retention of your material. However, there are wonderful resources on continuing on the journey of becoming an amazing public speaker, which includes understanding the psychology and neuroscience behind human perception and learning. For example, as highlighted in Rule 7, David JP Phillips has a wonderful TEDx talk on the subject [ 5 ], and “PowerPoint presentation flaws and failures: A psychological analysis,” by Kosslyn and colleagues is deeply detailed about a number of aspects of human cognition and presentation style [ 4 ]. There are many books on the topic, including the popular “Presentation Zen” by Garr Reynolds [ 11 ]. Finally, although briefly touched on here, the visualization of data is an entire topic of its own that is worth perfecting for both written and oral presentations of work, with fantastic resources like Edward Tufte’s “The Visual Display of Quantitative Information” [ 12 ] or the article “Visualization of Biomedical Data” by O’Donoghue and colleagues [ 13 ].

Acknowledgments

I would like to thank the countless presenters, colleagues, students, and mentors from which I have learned a great deal from on effective presentations. Also, a thank you to the wonderful resources published by organizations on how to increase inclusivity. A special thanks to Dr. Jason Papin and Dr. Michael Guertin on early feedback of this editorial.

• View Article
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• Google Scholar
• 3. Teaching VUC for Making Better PowerPoint Presentations. n.d. Available from: https://cft.vanderbilt.edu/guides-sub-pages/making-better-powerpoint-presentations/#baddeley .
• 8. Creating a dyslexia friendly workplace. Dyslexia friendly style guide. nd. Available from: https://www.bdadyslexia.org.uk/advice/employers/creating-a-dyslexia-friendly-workplace/dyslexia-friendly-style-guide .
• 9. Cravit R. How to Use Color Blind Friendly Palettes to Make Your Charts Accessible. 2019. Available from: https://venngage.com/blog/color-blind-friendly-palette/ .
• 10. Making your conference presentation more accessible to blind and partially sighted people. n.d. Available from: https://vocaleyes.co.uk/services/resources/guidelines-for-making-your-conference-presentation-more-accessible-to-blind-and-partially-sighted-people/ .
• 11. Reynolds G. Presentation Zen: Simple Ideas on Presentation Design and Delivery. 2nd ed. New Riders Pub; 2011.
• 12. Tufte ER. The Visual Display of Quantitative Information. 2nd ed. Graphics Press; 2001.

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How to give a dynamic scientific presentation

August 4, 2015 | 12 min read

By Marilynn Larkin

Convey your ideas and enthusiasm – and avoid the pitfalls that put audiences to sleep

Joann Halpern, PhD, moderates a panel at the German Center for Research and Innovation in New York. (Photo by Nathalie Schueller)

Giving presentations is an important part of sharing your work and achieving recognition in the larger medical and scientific communities. The ability to do so effectively can contribute to career success.

However, instead of engaging audiences and conveying enthusiasm, many presentations fall flat. Pitfalls include overly complicated content, monotone delivery and focusing on what  you  want to say rather than what the audience is interested in hearing.

Effective presentations appeal to a wide range of audiences — those who work in your area of interest or in related fields, as well as potential funders, the media and others who may find your work interesting or useful.

There are two major facets to a presentation: the content and how you present it. Let’s face it, no matter how great the content, no one will get it if they stop paying attention. Here are some pointers on how to create clear, concise content for scientific presentations – and how to deliver your message in a dynamic way.

Presentation pointers: content

Here are five tips for developing effective content for your presentation:

1. Know your audience. 

Gear your presentation to the knowledge level and needs of the audience members. Are they colleagues? Researchers in a related field? Consumers who want to understand the value of your work for the clinic (for example, stem cell research that could open up a new avenue to treat a neurological disease)?

2. Tell audience members up front why they should care and what’s in it for them. 

What problem will your work help solve? Is it a diagnostic test strategy that reduces false positives? A new technology that will help them to do their own work faster, better and less expensively? Will it help them get a new job or bring new skills to their present job?

Dr. Marius Stan with Vince Gilligan, creator, producer and head writer for  Breaking Bad.

3. Convey your excitement. 

Tell a brief anecdote or describe the “aha” moment that convinced you to get involved in your field of expertise. For example,  Dr. Marius Stan opens in new tab/window , a physicist and chemist known to the wider world as the carwash owner on  Breaking Bad opens in new tab/window ,  explained that mathematics has always been his passion, and the “explosion” of computer hardware and software early in his career drove his interest to computational science, which involves the use of mathematical models to solve scientific problems. Personalizing makes your work come alive and helps audience members relate to it on an emotional level.

4. Tell your story. 

A presentation is  your  story. It needs a beginning, a middle and an end. For example, you could begin with the problem you set out to solve. What did you discover by serendipity? What gap did you think your work could fill? For the middle, you could describe what you did, succinctly and logically, and ideally building to your most recent results. And the end could focus on where you are today and where you hope to go.

Donald Ingber, MD, PhD, Director of the Wyss Institute for Biologically Inspired Engineering at Harvard University, gives a keynote address at the Society for Laboratory Automation and Screening’s 2015 conference and exhibition in Washington, DC.

Start with context . Cite research — by you and others — that brought you to this point. Where does your work fit within this context? What is unique about it? While presenting on organs-on-chips technology at a recent conference, Dr. Donald Ingber, Director of the Wyss Institute for Biologically Inspired Engineering at Harvard, described the pioneering work of others in the field, touched on its impact, then went on to show his unique contributions to the field. He did not

present his work out of context, as though his group were the only one achieving results.

Frame the problem : “We couldn’t understand why our experiment wasn’t working so we investigated further”; “We saw an opportunity to cut costs and speed things up.”

Prof. Doris Rusch, PhD, talks about creating games to mimic the struggles of anorexia and the anxiety of OCD, at the 12th Annual Games for Change Festival in New York City. (Photo by Gabi Porter)

Provide highlights of what you did, tied to the audience’s expertise and/or reasons for attending your presentation. Present the highlights in a logical order. Avoid going into excruciating detail. If people are interested in steps you don’t cover, they’ll ask and you can expand during the Q&A period. A meeting I covered on educational gaming  

gave presenters just 10 minutes each to talk about their work. Most used three to five slides, making sure to include a website address for more information on each slide. Because these speakers were well prepared, they were able to identify and communicate their key points in the short timeframe. They also made sure attendees who wanted more information would be able to find it easily on their websites. So don’t get bogged down in details — the what  is often more important than the how .

Conclude by summing up key points and acknowledging collaborators and mentors. Give a peek into your next steps, especially if you’re interested in recruiting partners. Include your contact details and Twitter handle.

5. Keep it simple. 

Every field has its jargon and acronyms, and science and medicine are no exceptions. However, you don’t want audience members to get stuck on a particular term and lose the thread of your talk. Even your fellow scientists will appreciate brief definitions and explanations of terminology and processes, especially if you’re working in a field like microfluidics, which includes collaborators in diverse disciplines, such as engineering, biomedical research and computational biology.

I’ve interviewed Nobel laureates who know how to have a conversation about their work that most anyone can understand – even if it involves complex areas such as brain chemistry or genomics. That’s because they’ve distilled their work to its essence, and can then talk about it at the most basic level as well as the most complicated. Regardless of the level of your talk, the goal should be to communicate, not obfuscate.

Presentation pointers: you

Here are 10 tips to help you present your scientific work and leave the audience wanting more.

1. Set the stage. 

Get your equipment ready and run through your slides if possible (use the “speaker ready” room if one is available). If you’ve never been in the venue, try getting there early and walk the room. Make sure you have water available.

2. Get ready to perform. 

Every presentation is a performance. The most important part is to know your lines and subject. Some people advocate memorizing your presentation, but if you do so, you can end up sounding stilted or getting derailed by an interruption. When you practice, focus on the key points you want to make (note them down if it helps) and improvise different ways of communicating them.

It’s well known that a majority of people fear public speaking — and even those who enjoy it may get stage fright. Fear of public speaking will diminish with experience. I’ve been presenting and performing for many years but still get stage fright. Try these strategies to manage the fear:

Breathe slowly and deeply for a few minutes before your talk.

Visualize yourself giving a relaxed talk to a receptive audience. This works best if you can close your eyes for a few minutes. If you’re sitting in the audience waiting to be introduced and can’t close your eyes, look up at the ceiling and try visualizing that way.

Do affirmations. Tell yourself you are relaxed, confident — whatever works for you. Whether affirmations are effective is a matter of debate, but you won’t know unless you try.

Assume one or more “power poses,” developed by social psychologist and dancer Dr. Amy Cuddy opens in new tab/window of the Harvard Business School, before giving your presentation. She demonstrates them in this TED talk opens in new tab/window . Power poses are part of the emerging field of embodiment research (see a comprehensive collection of articles opens in new tab/window related to this research in the journal Frontiers in Psychology ). Research on power poses has yielded mixed results to date, but they’re worth a try.

3. Stride up to the podium. 

Seeing you walk energetically energizes the audience. They expect you to engage them and you have their attention.

4. Stand tall and keep your chest lifted. 

It’s more difficult to breathe and speak when your shoulders are rolled forward and your chest caves in. Standing tall is also a way of conveying authority. If you’re presenting from a sitting position, sit up in your seat, keep your arms relaxed and away from your sides (i.e., don’t box yourself in by clasping your arms or clasping your hands in your lap).

Not only will you appear more relaxed if you smile, but research has shown that smiling — even when forced — reduces stress. Plus the audience enjoys watching and listening to someone who’s smiling rather than being stern or overly serious, especially if your topic is complicated.

One of the most enjoyable presentations I’ve covered was on animal versus human cognition. It dealt with the evolution and activation of different parts of the brain. By inserting anecdotes in with complex didactic information, presenter Dr. Onur Güntürkün, Professor of Biological Psychology at the Ruhr-Universität Bochum in Germany, made the topic accessible and compelling.

6. Speak up. 

The audience came to your talk so they really do want to hear what you have to say. If a microphone is available, use it. I’ve seen countless presenters stand in front of a microphone yet somehow manage not to talk into it. Talk from your diaphragm, not your throat, to give your voice authority and resonance.

7. Take your time. 

A moment or two of silence as you gather your thoughts or move to a new topic can actually make the audience pay attention. Don’t feel you have to talk continuously, and avoid filler phrases, such as “you know.”

8. Talk to the audience, not the screen. 

Making eye contact with one or more friendly faces can relax you and help you connect to the audience. It will also prevent you from reading your slides, which you don’t want to do unless absolutely necessary (for example, if you forget the statistics supporting a particular point).

9. Stick to your time frame. 

We’ve all done it, but it’s not fun to have to cycle rapidly through your last 10 slides because the moderator has given you a two-minute warning and you’re nowhere near the end. Try to pace yourself. When preparing your slides and practicing (i.e., rehearsing for your performance), make a note on the slide you think you should be discussing when you’re about midway through your talk. This gives you a benchmark and lets you know if you need to speed up or slow down the rest of the presentation.

Related resource

The  Elsevier Publishing Campus opens in new tab/window  is a free online platform that provides lectures, interactive training and professional advice on a wide range of topics, from the fundamentals of publishing to broader issues like gender in research and open science. Researchers can register for training courses, learn from leaders in research and publishing, and take part in topical debates. For every module or seminar completed, researchers are recognized for their efforts with an awarded  certificate opens in new tab/window  from Elsevier.

Six dos and don’ts of PowerPoint slides

1. Less is more.  Although there are no “rules,” I’ve found that 20-25 slides work well for a one hour presentation. You’ll have a better idea what works for you if you time yourself during a practice session.

2. Create sections.  Use a title slide to start a new section or change the subject. This will also help you organize your presentation and make sure it flows logically.

3. Avoid clutter.  Stick to three to five bullet points per slide  at most . Bullet points should contain key words — not complete sentences. For examples of what  not  to do, see this recent editorial in the  Washington Post , which  urges a ban on PowerPoint presentations opens in new tab/window .

4. Make it readable.  Rule of thumb for fonts: 28-40 point for headlines; 18-28 for text; 12-14 for references. Use  sans serif  fonts, and make sure you have a strong contrast between the background and text (e.g., black or dark blue text on a white background; white text on a blue background). Don’t use ALL CAPS; underscore a point by putting it in italics or bold (underlining can make the text more difficult to read).

5. Use visuals.  In a recent talk, presenters explained why biological image processing and analysis is a hot field in laboratory R&D. The reason is simple: you can tell a lot more about cells with an image versus a cell count. The same is true of your presentation: a single image of something particularly relevant to your work is more engaging and has the potential to convey more information than words.

That said, it’s important to keep the visual simple — an image of a single cell or pathway, for example. If you use graphs to show comparisons or results, indicate what the axes represent and which variables (ideally, not more than two or three) you’re displaying.

Generally, steer clear of videos. One of the few effective videos I’ve seen was of a Caledonian crow creating a tool to obtain food, which Dr. Güntürkün included in the presentation referred to above. Videos of in vitro experiments and imaging results rarely help support a point because the low resolution makes everything look grainy.

6. Check your spelling.  Nothing takes away from credibility like misspelled words, especially if they’re up on large screen for a minute or more — or worse, repeated throughout your presentation. After you use spell check, proof your presentation yourself. Let a day go by if possible; it’s easier to pick up errors after a break.

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Scientific Presentation Guide: How to Create an Engaging Research Talk

Creating an effective scientific presentation requires developing clear talking points and slide designs that highlight your most important research results..

Scientific presentations are detailed talks that showcase a research project or analysis results. This comprehensive guide reviews everything you need to know to give an engaging presentation for scientific conferences, lab meetings, and PhD thesis talks. From creating your presentation outline to designing effective slides, the tips in this article will give you the tools you need to impress your scientific peers and superiors.

Step 1. Create a Presentation Outline

The first step to giving a good scientific talk is to create a presentation outline that engages the audience at the start of the talk, highlights only 3-5 main points of your research, and then ends with a clear take-home message. Creating an outline ensures that the overall talk storyline is clear and will save you time when you start to design your slides.

Engage Your Audience

The first part of your presentation outline should contain slide ideas that will gain your audience's attention. Below are a few recommendations for slides that engage your audience at the start of the talk:

• Create a slide that makes connects your data or presentation information to a shared purpose, such as relevance to solving a medical problem or fundamental question in your field of research
• Create slides that ask and invite questions
• Use humor or entertainment

Identify Clear Main Points

After writing down your engagement ideas, the next step is to list the main points that will become the outline slide for your presentation. A great way to accomplish this is to set a timer for five minutes and write down all of the main points and results or your research that you want to discuss in the talk. When the time is up, review the points and select no more than three to five main points that create your talk outline. Limiting the amount of information you share goes a long way in maintaining audience engagement and understanding. 

Create a Take-Home Message

And finally, you should brainstorm a single take-home message that makes the most important main point stand out. This is the one idea that you want people to remember or to take action on after your talk. This can be your core research discovery or the next steps that will move the project forward.

Step 2. Choose a Professional Slide Theme

After you have a good presentation outline, the next step is to choose your slide colors and create a theme. Good slide themes use between two to four main colors that are accessible to people with color vision deficiencies. Read this article to learn more about choosing the best scientific color palettes .

You can also choose templates that already have an accessible color scheme. However, be aware that many PowerPoint templates that are available online are too cheesy for a scientific audience. Below options to download professional scientific slide templates that are designed specifically for academic conferences, research talks, and graduate thesis defenses.

Step 3. Design Your Slides

Designing good slides is essential to maintaining audience interest during your scientific talk. Follow these four best practices for designing your slides:

• Keep it simple: limit the amount of information you show on each slide
• Use images and illustrations that clearly show the main points with very little text. 
• Read this article to see research slide example designs for inspiration
• When you are using text, try to reduce the scientific jargon that is unnecessary. Text on research talk slides needs to be much more simple than the text used in scientific publications (see example below).
• Use appear/disappear animations to break up the details into smaller digestible bites
• Sign up for the free presentation design course to learn PowerPoint animation tricks

Scientific Presentation Design Summary

All of the examples and tips described in this article will help you create impressive scientific presentations. Below is the summary of how to give an engaging talk that will earn respect from your scientific community. 

Step 1. Draft Presentation Outline. Create a presentation outline that clearly highlights the main point of your research. Make sure to start your talk outline with ideas to engage your audience and end your talk with a clear take-home message.

Step 2. Choose Slide Theme. Use a slide template or theme that looks professional, best represents your data, and matches your audience's expectations. Do not use slides that are too plain or too cheesy.

Step 3. Design Engaging Slides. Effective presentation slide designs use clear data visualizations and limits the amount of information that is added to each slide. 

And a final tip is to practice your presentation so that you can refine your talking points. This way you will also know how long it will take you to cover the most essential information on your slides. Thank you for choosing Simplified Science Publishing as your science communication resource and good luck with your presentations!

Interested in free design templates and training?

Explore scientific illustration templates and courses by creating a Simplified Science Publishing Log In. Whether you are new to data visualization design or have some experience, these resources will improve your ability to use both basic and advanced design tools.

Interested in reading more articles on scientific design? Learn more below:

Data Storytelling Techniques: How to Tell a Great Data Story in 4 Steps

Best Science PowerPoint Templates and Slide Design Examples

Free Research Poster Templates and Tutorials

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How to Prepare Your Scientific Presentation

Since the dawn of time, humans were eager to find explanations for the world around them. At first, our scientific method was very simplistic and somewhat naive. We observed and reflected. But with the progressive evolution of research methods and thinking paradigms, we arrived into the modern era of enlightenment and science. So what represents the modern scientific method and how can you accurately share and present your research findings to others? These are the two fundamental questions we attempt to answer in this post. 

What is the Scientific Method?

To better understand the concept, let’s start with this scientific method definition from the International Encyclopedia of Human Geography :

The scientific method is a way of conducting research, based on theory construction, the generation of testable hypotheses, their empirical testing, and the revision of theory if the hypothesis is rejected. 

Essentially, a scientific method is a cumulative term, used to describe the process any scientist uses to objectively interpret the world (and specific phenomenon) around them. 

The scientific method is the opposite of beliefs and cognitive biases — mostly irrational, often unconscious, interpretations of different occurrences that we lean on as a mental shortcut. 

The scientific method in research, on the contrary, forces the thinker to holistically assess and test our approaches to interpreting data. So that they could gain consistent and non-arbitrary results. 

The common scientific method examples are:

• Systematic observation 
• Experimentation
• Inductive and deductive reasoning
• Formation and testing of hypotheses and theories

All of the above are used by both scientists and businesses to make better sense of the data and/or phenomenon at hand. 

The Evolution of the Scientific Method 

According to the Stanford Encyclopedia of Philosophy , ancient thinkers such as Plato and Aristotle are believed to be the forefathers of the scientific method. They were among the first to try to justify and refine their thought process using the scientific method experiments and deductive reasoning. 

Both developed specific systems for knowledge acquisition and processing. For example, the Platonic way of knowledge emphasized reasoning as the main method for learning but downplayed the importance of observation. The Aristotelian corpus of knowledge, on the contrary, said that we must carefully observe the natural world to discover its fundamental principles. 

In medieval times, thinkers such as Thomas Aquinas, Roger Bacon, and Andreas Vesalius among many others worked on further clarifying how we can obtain proven knowledge through observation and induction. 

The 16th–18th centuries are believed to have given the greatest advances in terms of scientific method application. We, humans, learned to better interpret the world around us from mechanical, biological, economic, political, and medical perspectives. Thinkers such as Galileo Galilei, Francis Bacon, and their followers also increasingly switched to a tradition of explaining everything through mathematics, geometry, and numbers. 

Up till today, mathematical and mechanical explanations remain the core parts of the scientific method. 

Why is the Scientific Method Important Today? 

Because our ancestors didn’t have as much data as we do. We now live in the era of paramount data accessibility and connectivity, where over 2.5 quintillions of data are produced each day. This has tremendously accelerated knowledge creation.

But, at the same time, such overwhelming exposure to data made us more prone to external influences, biases, and false beliefs. These can jeopardize the objectivity of any research you are conducting. 

Scientific findings need to remain objective, verifiable, accurate, and consistent. Diligent usage of scientific methods in modern business and science helps ensure proper data interpretation, results replication, and undisputable validity. 

6 Steps of the Scientific Method

Over the course of history, the scientific method underwent many interactions. Yet, it still carries some of the integral steps our ancestors used to analyze the world such as observation and inductive reasoning. However, the modern scientific method steps differ a bit. 

1. Make an Observation 

An observation serves as a baseline for your research. There are two important characteristics for a good research observation:

• It must be objective, not subjective. 
• It must be verifiable, meaning others can say it’s true or false with this. 

For example, This apple is red (objective/verifiable observation). This apple is delicious (subjective, harder-to-verify observation).

2. Develop a Hypothesis

Observations tell us about the present or past. But the goal of science is to glean in the future. A scientific hypothesis is based on prior knowledge and produced through reasoning as an attempt to descriptive a future event.

Here are characteristics of a good scientific hypothesis: 

• General and tentative idea
• Agrees with all available observations
• Testable and potentially falsifiable

Remember: If we state our hypothesis to indicate there is no effect, our hypothesis is a cause-and-effect relationship . A hypothesis, which asserts no effect, is called a null hypothesis. 

3. Make a Prediction 

A hypothesis is a mental “launchpad” for predicting the existence of other phenomena or quantitative results of new observations.

Going back to an earlier example here’s how to turn it into a hypothesis and a potential prediction for proving it. For example: If this apple is red, other apples of this type should be red too. 

Your goal is then to decide which variables can help you prove or disprove your hypothesis and prepare to test these. 

4. Perform an Experiment 

Collect all the information around variables that will help you prove or disprove your prediction. According to the scientific method, a hypothesis has to be discarded or modified if its predictions are clearly and repeatedly incompatible with experimental results.

Yes, you may come up with an elegant theory. However, if your hypothetical predictions cannot be backed by experimental results, you cannot use them as a valid explanation of the phenomenon. 

5. Analyze the Results of the Experiment

To come up with proof for your hypothesis, use different statistical analysis methods to interpret the meaning behind your data.

Remember to stay objective and emotionally unattached to your results. If 95 apples turned red, but 5 were yellow, does it disprove your hypothesis? Not entirely. It may mean that you didn’t account for all variables and must adapt the parameters of your experiment. 

Here are some common data analysis techniques, used as a part of a scientific method: 

• Statistical analysis
• Cause and effect analysis (see cause and effect analysis slides )
• Regression analysis
• Factor analysis
• Cluster analysis
• Time series analysis
• Diagnostic analysis
• Root cause analysis (see root cause analysis slides )

6. Draw a Conclusion 

Every experiment has two possible outcomes:

• The results correspond to the prediction
• The results disprove the prediction 

If that’s the latter, as a scientist you must discard the prediction then and most likely also rework the hypothesis based on it. 

How to Give a Scientific Presentation to Showcase Your Methods

Whether you are doing a poster session, conference talk, or follow-up presentation on a recently published journal article, most of your peers need to know how you’ve arrived at the presented conclusions.

In other words, they will probe your scientific method for gaps to ensure that your results are fair and possible to replicate. So that they could incorporate your theories in their research too. Thus your scientific presentation must be sharp, on-point, and focus clearly on your research approaches. 

Below we propose a quick framework for creating a compelling scientific presentation in PowerPoint (+ some helpful templates!). 

1. Open with a Research Question 

Here’s how to start a scientific presentation with ease: share your research question. On the first slide, briefly recap how your thought process went. Briefly state what was the underlying aim of your research: Share your main hypothesis, mention if you could prove or disprove them. 

It might be tempting to pack a lot of ideas into your first slide but don’t. Keep the opening of your presentation short to pique the audience’s initial interest and set the stage for the follow-up narrative.

2. Disclose Your Methods

Whether you are doing a science poster presentation or conference talk, many audience members would be curious to understand how you arrived at your results. Deliver this information at the beginning of your presentation to avoid any ambiguities. 

Here’s how to organize your science methods on a presentation: 

• Do not use bullet points or full sentences. Use diagrams and structured images to list the methods
• Use visuals and iconography to use metaphors where possible.
• Organize your methods by groups e.g. quantifiable and non-quantifiable

Finally, when you work on visuals for your presentation — charts, graphs, illustrations, etc. — think from the perspective of a subject novice. Does the image really convey the key information around the subject? Does it help break down complex ideas?

3. Spotlight the Results 

Obviously, the research results will be your biggest bragging right. However, don’t over-pack your presentation with a long-winded discussion of your findings and how revolutionary these may be for the community. 

Rather than writing a wall of text, do this instead:

• Use graphs with large axis values/numbers to showcase the findings in great detail
• Prioritize formats that are known to everybody (e.g. odds ratios, Kaplan Meier curves, etc.)
• Do not include more than 5 lines of plain text per slide 

Overall, when you feel that the results slide gets too cramped, it’s best to move the data to a new one. 

Also, as you work on organizing data on your scientific presentation PowerPoint template , think if there are obvious limitations and gaps. If yes, make sure you acknowledge them during your speech.

4. Mention Study Limitations 

The scientific method mandates objectivity. That’s why every researcher must clearly state what was excluded from their study. Remember: no piece of scientific research is truly universal and has certain boundaries. However, when you fail to personally state those, others might struggle to draw the line themselves and replicate your results. Then, if they fail to do so, they’d question the viability of your research.

5. Conclude with a Memorable Takeaway Message 

Every experienced speaker will tell you that the audience best retains the information they hear first and last. Most people will attend more than one scientific presentation during the day. 

So if you want the audience to better remember your talk, brainstorm a take-home message for the last slide of your presentation. Think of your last slide texts as an elevator pitch — a short, concluding message, summarizing your research.

To Conclude

Today we have no shortage of research and scientific methods for testing and proving our hypothesis. However, unlike our ancestors, most scientists experience deeper scrutiny when it comes to presenting and explaining their findings to others. That’s why it’s important to ensure that your scientific presentation clearly relays the aim, vector, and thought process behind your research.

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Advancing your Scientific Presentations

For researchers in the natural sciences who want to improve the quality of their peer-to-peer scientific presentations with both virtual and face-to-face audiences

10 experts who excel at presenting their work, including renowned presentation designers, and trainers and experts in narrative tools

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'Advancing Your Scientific Presentations' teaches you how to create more memorable and engaging presentations to your scientific peers. In the course, you will discover how you can develop your research story - the foundation of your presentation - using narrative tools, how to build a slide deck that supports and enhances your presentation, and how to prepare to deliver your presentation on the day.

What you'll learn

• To identify techniques that can help to overcome the challenges that researchers commonly face when creating and delivering oral presentations
• To build compelling research stories to use as the foundation for your presentations
• To create professional slide decks that effectively communicate your research findings to your audience
• To apply strategies to help you deliver your presentation effectively on the day, in both virtual and face-to-face environments

Free Sample Overcoming your research presentation challenges

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5 tips for giving a good scientific presentation

What is a scientific presentation?

What is the objective of a scientific presentation, why is giving scientific presentations necessary, how to give a scientific presentation, tip 1: prepare during the days leading up to your talk, tip 2: deal with presentation nerves by practicing simple exercises, tip 3: deliver your talk with intention, tip 4: be adaptable and willing to adjust your presentation, tip 5: conclude your talk and manage questions confidently, concluding thoughts, other sources to help you give a good scientific presentation, frequently asked questions about giving scientific presentations, related articles.

You have made the slides for your scientific presentation. Now, you need to prepare to deliver your talk. But, giving an oral scientific presentation can be nerve-wracking. How do you ensure that you deliver your talk well, and leave a good impression on the audience?

Mastering the skill of giving a good scientific presentation will stand you in good stead for the rest of your career, as it may lead to new collaborations or even new employment opportunities.

In this guide, you’ll find everything you need to know to give a good oral scientific presentation, including

• Why giving scientific presentations is important for your career;
• How to prepare before giving a scientific presentation;
• How to keep the audience engaged and deliver your talk with confidence.

The following tips are a product of our research into the literature on giving scientific presentations as well as our own experiences as scientists in giving and attending talks. We advise on how to make a scientific presentation in another post.

A scientific presentation is a talk or poster where you describe the findings of your research to others. An oral presentation usually involves presenting slides to an audience. You may give an oral scientific presentation at a conference, give an invited seminar at another institution, or give a talk as part of an interview. A PhD thesis defense is one type of scientific presentation.

➡️ Read about how to prepare an excellent thesis defense

The objective of a scientific presentation is to communicate the science such that the audience:

• Learns something new;
• Leaves with a clear understanding of the key message of your research;
• Has confidence in you and your work;
• Remembers you afterward for the right reasons.

As a scientist, one of your responsibilities is disseminating your scientific knowledge by giving presentations. Communicating your research to others is an altruistic act, as it is an opportunity to teach others about your research findings, and the knowledge you have gained while researching your topic.

Giving scientific presentations confers many career benefits , such as:

• Having the opportunity to share your ideas and to have insightful conversations with other scientists. For example, a thoughtful question may create a new direction for your research.
• Gaining recognition for your work and generating excitement for your research program can help you to forge new collaborations and to obtain more citations of your papers. It's your chance to impress some of the biggest names in your field, build your reputation as a scientist, and get more people interested in your work.
• Improving your future employment prospects by getting presentation experience in high-stakes settings and by having talks listed on your academic CV.

➡️ Learn how to write an academic CV

You might have just 10 minutes for your talk. But those 10 minutes are your golden ticket. To make them shine, you'll need to put in some homework. You need to think about the story you want to tell , create engaging slides , and practice how you're going to deliver it.

Why all this effort? Because the rewards are potentially huge. Imagine speaking to the top names in your field, boosting your visibility, and getting more eyes on your work. It's more than just a talk; it's your chance to showcase who you are and what you do.

Here we share 5 tips for giving effective scientific presentations.

• Prepare adequately for your talk on the days leading up to it
• Deal with presentation nerves
• Deliver your talk with intention
• Be adaptable
• Conclude your talk with confidence

You should prepare for your talk with the seriousness it deserves and recognize the potential it holds for your career advancement. Here are our suggestions:

• Rehearse your talk multiple times to ensure smooth flow. Know the order of your slides and key transitions without memorizing every word. Practice your speech as though you are discussing with friendly and attentive listeners.
• Record your speech and listen back to yourself giving your talk while doing household chores or while going for a walk. This will help you remember the important points of your talk and feel more comfortable with the flow of it on the day.
• Anticipate potential questions that may arise during your talk, write down your responses to those questions, and practice them aloud.
• Back up your presentation in cloud storage and on a USB key. Bring your laptop with you on the day of your talk, if needed.
• Know the time and location of your talk. Familiarize yourself with the room, if you can. Introduce yourself to the moderator before the session begins.
• Giving a talk is a performance, so preparing yourself physically and mentally is essential. Prioritize good sleep and hydration, and eat healthy, nourishing food on the day of your talk. Plan your attire to be both professional and comfortable.

It’s natural to feel nervous before your talk, but you want to harness that energy to present your work with confidence. Here are some ways to manage your stress levels:

• Remember that your audience want to listen to you and learn from you. Believe that your audience will be kind, friendly, and interested, rather than bored and skeptical.
• Breathing slow and deep before your talk calms the mind and nervous system. Psychologist Amy Cuddy recommends practicing open, confident postures while sitting and standing to help you get into a positive frame of mind.
• Fight off impostor syndrome with positive affirmations. You’ve got this! Remember that you know more about your research than anyone else in the room and you are giving your talk to teach others about it.

Giving your talk with confidence is crucial for your credibility as a scientist. Focusing on your delivery helps ensure that your audience remembers and believes what you say. Here are some techniques to try:

• Before beginning, remember your professional goals and the benefits of giving your presentation. Start with a smile and exhale deeply.
• Memorize a simple opening. After the moderator introduces you, pause and take a breath. Welcome the audience, thank them for coming, and introduce yourself. You don’t need to read the title of your talk. But briefly, say something like, “today I’m going to talk to you about why [topic] is important and [what I hope you will learn from this talk]” in 1-2 sentences. Preparing your opening will settle your nerves and prevent you from starting your talk on a tangential topic, ensuring you stay on time.
• Project confidence outwardly, even if you feel nervous. Stand up tall with your shoulders back and make eye contact with individuals in the audience. Move your focus around the room, so everyone in the audience feels included.
• Maintain open body language and face the audience as much as possible, not your slides.
• Project your voice as much as you can so that people at the back of the room can hear you. Enunciate your words, avoid mumbling, and don’t trail off awkwardly.
• Varying your vocal delivery and intonation will make your talk more interesting and help the audience pay attention, particularly when you want to emphasize key points or transitions.
• Pausing for dramatic effect at crucial moments can help you relax and remember your message, as well as being an effective engagement device.
• A laser pointer can be off-putting for the audience if you are prone to having a shaky hand when nervous. Use a laser pointer only to emphasize information on the slide while providing an explanation. If you design your slides thoughtfully , you won’t need to use a laser pointer.

Not all parts of your talk may go according to plan. Here are some ways to adapt to hitches during your talk:

• Handle talk disruptions gracefully. If you make a mistake, or a technical issue occurs during your talk, remember that it’s okay to skip something and move on without apologizing.
• If you forget to mention something but the audience hasn’t noticed, don’t point it out! They don’t need to know.
• As you give your talk, be time-conscious, and watch the moderator for signals that the time is about to expire. If you realize you won’t have time to discuss all your slides, skip the less important ones. Adjust your presentation on the fly to finish on time, prioritizing content as needed.
• If you run out of time completely, just stop. You don’t have to give a conclusion, but you do need to stop on time! Practicing your talk should prevent this situation.

The ending of your talk is important for emphasizing your key message and ensuring the audience leave with a positive impression of you and your work. Here are some pointers.

• Conclude your talk with a memorized closing statement that summarizes the key take-home message of your research. After making your closing statement, end your talk with a simple “Thank you”. Then pause and wait for the applause. You don’t need to ask if the audience has questions because the moderator will call for questions on your behalf.
• When you receive a question, pause, then repeat the question. This ensures the whole audience understands the question and gives you time to calmly consider your answer.
• In a talk on attaining confidence in your scientific presentations, Michael Alley suggests that if you don’t know the answer to the question, then emphasize what you do know. Say something like, “Although I can’t fully answer your question, I can say [this about the topic].”
• Approach the Q&A with interest rather than anxiety by reframing it as an opportunity to further share your knowledge. Being curious, instead of feeling fearful, can help you shine during what might be the most stressful part of your presentation.

Communicating your research effectively is a key skill for early career scientists to learn. Taking ample time to prepare and practice your presentation is an investment in your scientific development.

But here's the good part: all that effort pays off. Think of your talk as not just a presentation, but as a way to show off what you and your research are all about. Giving a compelling scientific presentation will raise your professional profile as a scientist, lead to more citations of your work, and may even help you obtain a future academic job.

But most importantly of all, giving talks contributes to science, and sharing your knowledge is an act of generosity to the scientific community.

➡️ Questions to ask yourself before you make your talk

➡️ How to give a great scientific talk

1) Have a positive mindset. To help with nerves, breathe deeply and keep in mind that you are an authority on your topic. 2) Be prepared. Have a short list of points for each slide and know the key transition points of your talk. Practice your talk to ensure it flows smoothly. 3) Be well-rested before your talk and eat a light meal on the day of your presentation. A talk is a performance. 4) Project your voice and vary your vocal intonation and pitch to retain the interest of the audience. Take pauses at key moments, for emphasis. 5) Anticipate questions that audience members could ask, and prepare answers for them.

The goal of a scientific presentation is that the audience remembers the key outcomes of your research and that they leave with a good impression of you and your science.

Take a moment to exhale deeply and collect your thoughts after the moderator has introduced you. Don’t read your talk's title. Instead, introduce yourself, thank the audience for attending, and provide a warm welcome. Then say something along the lines of, "Today I'm going to talk to you about why [topic] is important and [what I hope you will learn from this presentation].” A rehearsed opening will ensure that you start your talk on a confident note.

Prepare a memorable closing statement that emphasizes the key message of your talk. Then end with a simple “Thank you”.

Preparation is key. Practice many times to familiarize yourself with the content of your presentation. Before giving your talk, breathe slowly and deeply, and remind yourself that you are the expert on your topic. When giving your talk, stand up tall and use open body language. Remember to project your voice, and make eye contact with members of the audience.

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How to Deliver Great Scientific Presentations A Guide for Scientists and Engineers

• Jean-Philippe Dionne

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How to Deliver Great Scientific Presentations

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This video provides concise and effective tips spanning all relevant areas to deliver engaging scientific presentations. You will strengthen your skills in preparing, practicing and delivering presentations at both physical and virtual conferences and seminars. Best practices for structuring presentations and elements to include and those to exclude such as detailed sections on the use of videos, animations and tables are included. Common errors often seen in scientific presentations are highlighted along with tips on how to interact with audiences and keep them engaged. This will be a valuable resource for scientists in all areas of chemistry and materials science as well as engineers who wish to elevate their scientific presentations.

Introduction

A straight to the point video providing concise and effective tips spanning all relevant areas to delivering engaging scientific presentations.

About The Author

Jean-Philippe Dionne, Ph.D. in Mechanical Engineering (McGill University, Canada) has authored a number of scientific publications (conference proceedings, journal or magazine articles) in the field of personal protective equipment during his 20-year career in the industry. He has spent countless hours preparing and delivering presentations for scientific conferences and other events in various forms throughout his career.

About this video

Related content, presentation skills for scientists and engineers the slide master.

• Dr. Jean-Philippe Dionne

Video Transcript

[MUSIC PLAYING]

It strikes me every time I attend scientific conferences to realize that most presenters definitely stars in their respective domains of research. There are representations that are either boring, way too complex, or both. It’s great to spend 10 years of one’s life at University to get some prestigious degree, but why isn’t any time spent on learning how to give effective presentations?

Great speakers are entertaining and instill confidence. But despite their speaking skills, their message might not get across properly if they rely on poor visual backup. On the brighter side, even a poor public speaker with a shaky mastery of the language can deliver a great and well-structured talk if backed up by the appropriate visual.

Towards that goal, the following video segments are filled with many tricks and tips provided in a very concise manner. The main sections to be covered are some basics to get us started, animations, images and videos, graphs– they rarely get the attention they deserve– tables, maths in equations– always intimidating– structure of your talk, interactions, practice tricks, planning, and delivery– the few terrifying minutes on the stage.

My name is Jean-Philippe Dionne– PhD in mechanical engineering, working in industry with more than 20 years experience delivering scientific presentation, as well as an acute observer of other people’s presentations. I’m confident that all those following the advice provided here, whether young undergrads or seasoned scientists, are likely to benefit from these videos. Let’s proceed.

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• 12 May 2021

Good presentation skills benefit careers — and science

• David Rubenson 0

David Rubenson is the director of the scientific-communications firm No Bad Slides ( nobadslides.com ) in Los Angeles, California.

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A better presentation culture can save the audience and the larger scientific world valuable time and effort. Credit: Shutterstock

In my experience as a presentation coach for biomedical researchers, I have heard many complaints about talks they attend: too much detail, too many opaque visuals, too many slides, too rushed for questions and so on. Given the time scientists spend attending presentations, both in the pandemic’s virtual world and in the ‘face-to-face’ one, addressing these complaints would seem to be an important challenge.

I’m dispirited that being trained in presentation skills, or at least taking more time to prepare presentations, is often not a high priority for researchers or academic departments. Many scientists feel that time spent improving presentations detracts from research or clocking up the numbers that directly affect career advancement — such as articles published and the amount of grant funding secured. Add in the pressing, and sometimes overwhelming, bureaucratic burdens associated with working at a major biomedical research institute, and scientists can simply be too busy to think about changing the status quo.

Improving presentations can indeed be time-consuming. But there are compelling reasons for researchers to put this near the top of their to-do list.

You’re probably not as good a presenter as you think you are

Many scientists see problems in colleagues’ presentations, but not their own. Having given many lousy presentations, I know that it is all too easy to receive (and accept) plaudits; audiences want to be polite. However, this makes it difficult to get an accurate assessment of how well you have communicated your message.

Why your scientific presentation should not be adapted from a journal article

With few exceptions, biomedical research presentations are less effective than the speaker would believe. And with few exceptions, researchers have little appreciation of what makes for a good presentation. Formal training in presentation techniques (see ‘What do scientists need to learn?’) would help to alleviate these problems.

Improving a presentation can help you think about your own research

A well-designed presentation is not a ‘data dump’ or an exercise in advanced PowerPoint techniques. It is a coherent argument that can be understood by scientists in related fields. Designing a good presentation forces a researcher to step back from laboratory procedures and organize data into themes; it’s an effective way to consider your research in its entirety.

You might get insights from the audience

Overly detailed presentations typically fill a speaker’s time slot, leaving little opportunity for the audience to ask questions. A comprehensible and focused presentation should elicit probing questions and allow audience members to suggest how their tools and methods might apply to the speaker’s research question.

Many have suggested that multidisciplinary collaborations, such as with engineers and physical scientists, are essential for solving complex problems in biomedicine. Such innovative partnerships will emerge only if research is communicated clearly to a broad range of potential collaborators.

It might improve your grant writing

Many grant applications suffer from the same problem as scientific presentations — too much detail and a lack of clearly articulated themes. A well-designed presentation can be a great way to structure a compelling grant application: by working on one, you’re often able to improve the other.

It might help you speak to important, ‘less-expert’ audiences

As their career advances, it is not uncommon for scientists to increasingly have to address audiences outside their speciality. These might include department heads, deans, philanthropic foundations, individual donors, patient groups and the media. Communicating effectively with scientific colleagues is a prerequisite for reaching these audiences.

Collection: Conferences

Better presentations mean better science

An individual might not want to spend 5 hours improving their hour-long presentation, but 50 audience members might collectively waste 50 hours listening to that individual’s mediocre effort. This disparity shows that individual incentives aren’t always aligned with society’s scientific goals. An effective presentation can enhance the research and critical-thinking skills of the audience, in addition to what it does for the speaker.

What do scientists need to learn?

Formal training in scientific presentation techniques should differ significantly from programmes that stress the nuances of public speaking.

The first priority should be to master basic presentation concepts, including:

• How to build a concise scientific narrative.

• Understanding the limitations of slides and presentations.

• Understanding the audience’s time and attention-span limitations .

• Building a complementary, rather than repetitive, relationship between what the speaker says and what their slides show.

The training should then move to proper slide design, including:

• The need for each slide to have an overarching message.

• Using slide titles to help convey that message.

• Labelling graphs legibly.

• Deleting superfluous data and other information.

• Reducing those 100-word text slides to 40 words (or even less) without losing content.

• Using colour to highlight categories of information, rather than for decoration.

• Avoiding formats that have no visual message, such as data tables.

A well-crafted presentation with clearly drawn slides can turn even timid public speakers into effective science communicators.

Scientific leaders have a responsibility to provide formal training and to change incentives so that researchers spend more time improving presentations.

A dynamic presentation culture, in which every presentation is understood, fairly critiqued and useful for its audience, can only be good for science.

Nature 594 , S51-S52 (2021)

doi: https://doi.org/10.1038/d41586-021-01281-8

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Introduction

Presentation methods, delivering a presentation, study methods, discussion: transform, acknowledgements, how to prepare and deliver a scientific presentation : teaching course presentation at the 21st european stroke conference, lisboa, may 2012.

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Andrei V. Alexandrov , Michael G. Hennerici; How to Prepare and Deliver a Scientific Presentation : Teaching Course Presentation at the 21st European Stroke Conference, Lisboa, May 2012 . Cerebrovasc Dis 1 April 2013; 35 (3): 202–208. https://doi.org/10.1159/000346077

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Background: A scientific presentation is a professional way to share your observation, introduce a hypothesis, demonstrate and interpret the results of a study, or summarize what is learned or to be studied on the subject. Presentation Methods: Commonly, presentations at major conferences include podium (oral, platform), poster or lecture, and if selected one should be prepared to PRESENT: P lan from the start (place integral parts of the presentation in logical sequence); R educe the amount of text and visual aids to the bare minimum; E lucidate (clarify) methods; S ummarize results and key messages; E ffectively deliver; N ote all shortcomings, and T ransform your own and the current thinking of others. We provide tips on how to achieve this. Presentation Results: After disclosing conflicts, if applicable, start with a brief summary of what is known and why it is required to investigate the subject. State the research question or the purpose of the lecture. For original presentations follow a structure: Introduction, Methods, Results, Conclusions. Invest a sufficient amount of time or poster space in describing the study methods. Clearly organize and deliver the results or synopsis of relevant studies. Include absolute numbers and simple statistics before showing advanced analyses. Remember to present one point at a time. Stay focused. Discuss study limitations. In a lecture or a podium talk or when standing by your poster, always think clearly, have a logical plan, gain audience attention, make them interested in your subject, excite their own thinking about the problem, listen to questions and carefully weigh the evidence that would justify the punch-line. Conclusions: Rank scientific evidence in your presentation appropriately. What may seem obvious may turn erroneous or more complex. Rehearse your presentation before you deliver it at a conference. Challenge yourself to dry runs with your most critically thinking colleagues. When the time comes, ace it with a clear mind, precise execution and fund of knowledge.

Over time communication standards between -scientists have evolved along with improved scientific method, increasing scrutiny of analyses and upholding to the highest level of evidence anything we call research. Scientific presentation is a professional way of sharing your observation, introducing a hypothesis, demonstrating and interpreting the results of a study, or -summarizing what has been learned or is to be studied on the subject. Professional presentations help disseminate research, make peers aware of novel approaches, findings or problems. These presentations make conferences memorable for both presenters and the audience. Anyone can recall the most exciting and most boring, the most clear and most convoluted, the most ‘-seriously?!' and the most ‘wow!!' presentations. Most presentations, however, fall in the in-between level of ‘so what?', ‘I did not quite get it …', or ‘maybe'. This means that all the work the authors have put in did not result in a paradigm shift, -advancement, or even ‘well, this is good to know' kind of an impact. We struggle to shape up our young presenters to make their science clear and visible, their presence known and their own networks grow.

Having initially struggled in preparing and delivering presentations ourselves, and having seen the many baby steps of our trainees now accomplished or shy of a track record, we have put together these suggestions on how to start, organize and accomplish what at first sight looks like a daunting task: presenting in front of people, many of whom may have expertise way beyond your own or who are scrutinizing every bit of data and ready to shred any evidence you might have to pieces. Unfortunately, there is no other way to advance science and become recognized than to survive this campaign from conception of a project to publication. This campaign has its own (often interim and hopefully not singular) culmination in a scientific presentation. This presentation also comes with question and answer sessions and importantly, with you and the audience possibly coming out of it with new messages, new thinking and even energy for breakthroughs, no matter how small or large the leap would be. So let's explore how to prepare and deliver a scientific presentation.

Currently, the common types of presentations at major conferences include podium (oral, platform), poster or lecture. Although seemingly different and at times some being more desirable over others, they all share the same prerequisites and challenges for successful execution. We will examine common threads and identify unique aspects of each type of these presentations. However, the first prerequisite for any scientific presentation (successful or not) is you, the presenter.

An effective presenter should have led the study, participated in the analysis and drafting of the abstract and manuscript, i.e. the presenter should know the subject of his or her talk inside out. One should therefore be prepared to PRESENT:

P lan from the start (place integral parts of the presentation in logical sequence);

R educe the amount of text and visual aids to the bare minimum;

E lucidate (clarify) methods;

S ummarize results and key messages;

E ffectively deliver;

N ote all shortcomings, and

T ransform your own and the current thinking of others.

So, as the scuba-diving instructors say: plan the dive, and dive the plan. The most important parts of scientific presentations should follow the logic of delivering the key messages. For the original presentations (platforms or posters), it is easy to simply follow the accepted abstracts, most often structured following the IMRaD principle: Introduction, Methods, Results and Discussion (Conclusions).

Lecture format, content and logical flow of information often depend on the topic choice, which should be appropriate to the level of audience [ 1 ], time allotment and the target audience. Most competitive conferences offer short times even for invited lecturers as experts are expected to demonstrate cutting edge science, which assumes that the audience is already knowledgeable and the expert is capable of delivering information that sparks new thinking. The suggestion here to both novice and experienced speakers is to quickly summarize why the subject of presentation is important (catch audience attention [ 2,3 ]), where we are now (show the landscape of completed studies that established the common knowledge or conundrums, equipoise, etc.) and to move then to the latest advancements (this may include just-in publications, ongoing or planned future research or the most provocative take on the evidence out there).

Turning back to original presentations, advice is available on how to write abstracts following the IMRaD principle [ 4 ] and how to draft subsequent manuscripts [ 5 ]. We cannot stress enough the need to quickly follow-up the abstract submission with drafting the full manuscript. If the authors complete a manuscript before the presentation at a conference, the presenter will have a luxury of material to work with to compile either a set of slides for the podium or text and illustrations for the poster. If a manuscript was drafted and reviewed by coauthors, the challenge for a presenter is going to be a good one: trim down most sentences as both slides and posters benefit from short statements (not even full sentences) and large font sizes so that text can be easily read from a distance. Put yourself into the audience: your slides should be readable from the last row of a large room or a huge ballroom and your poster should be still readable from at least 2 m. The latter will allow better poster viewing by several people during guided poster tours or when a small group gathers spontaneously to view it.

This logically brings us to the second step: use bare minimum of any type of information to deliver your -presentation. Minimum text, minimum lines, minimum images, graphs, i.e. provide only the essential information as the audience attention span is short. Brevity, however, should not compromise quality: you should always stride to have the highest quality visual aids since these leave an impression on the audience [ 6 ] and good quality graphics are attributes of effective presentations [ 3 ].

At the same time, we cannot overemphasize the need to stick to time limits set for a specific presentation. Presenters should test their presentation in ‘real life' at home to their friends or at work in front of colleagues and ask for criticism. It is better to get criticism from members of the department (including your boss) than in a huge auditorium. Use a simple rule: an average talking time is 1 min per slide in oral presentations. You can then see how little you really can allocate to each slide if you load your talk with the most complicated visual presentation of data.

Let's go to the specifics. The ‘Introduction' slide usually includes a very brief description of background and should explicitly state the research question. Call it ‘Introduction and Study Purpose'. Adding a separate slide for study aims lengthens the talk. Fewer slides also reduce the chance of making an error when advancing them on the podium that can send presenters into further time deficit and stress, a commonplace even with those who know how to right-click.

Methods should have bullet points, not necessarily full sentences since you will be speaking over slides projecting or in front of the poster to connect brief statements showing behind you. The basic rule is not to read your slides or poster, nor tell the audience to read what the slide or poster says. Think of your slides or display material as a reminder to yourself of what you are supposed to say in detail and leave the noncritical words out of the slide and off the poster as it is an even easier source to pack with unreadable information. When you develop a presentation imagine you are a novice to the field who would like to be educated and taken on a journey while seeing and hearing the presentation. What can I learn in these few minutes? As the presenter, also think ‘what can I pass to the audience in these few minutes?' Further advice on how to plan, focus and arrange material to support key messages is available [ 7,8 ].

Results are the key part of any scientific presentation, podium, poster or lecture, and the most time, space and careful ascertainment should be allotted to this section as is necessary and feasible. It is vital to pack your presentation with data that support your key messages. Remember, a picture is worth a thousand words but show only quint-essential images or graphs. If appropriate include statistics and make this easy in structure, i.e. use formats or values known by everybody such as odds ratios, Kaplan Meier curves, etc. (do not forget to include these data in the abstract as abstracts without data, numbers and calculations are often low rated or rejected). After presenting data, show what you think of that or what the limitations are since you thought more about this than the audience, at least through preparation of your own presentation.

The last two concluding paragraphs (poster), comments (this section of a lecture), or slides (podium) are supposed to cover study limitations and conclusions. These should be the most carefully thought through, strategically worded and evidence-based part of your presentation. Your reputation depends on the quality of data interpretation. Also, think about a take-home message with the main message you want to be remembered. When practicing your presentations, deliver your talk to your nonmedical spouse, boyfriend or girlfriend: by the end of your presentation he or she should be able to repeat the take home message with best-prepared presentations.

After conclusions, an ‘Acknowledgements' slide is nice to have at the end showing whom you are grateful to, but it will not rescue a hopeless presentation. The ‘thanks to my colleagues' should not come at the expense of time, quality and content of your scientific presentation. There is no need to thank multiple people like they often do at the Oscars. You have to rationally consider who and when to acknowledge if their functions were important to your work but they were not listed among coauthors. If you received funding to support your work, it is very important where appropriate or at the end of the presentation to acknowledge your sponsors or grant providers (such as NIH Institute and grant number, MRC grant, INSERM or DFG labels, etc.). The higher the scientific level of the grant donors, the more your presentation will be recognized.

While preparing any part of your presentation, remind yourself to check whether the included material is any good and worthy of inclusion. You can simply ask, ‘am I wasting time during the oral presentation or space in the poster by including this and that?' The answer lies in checking if this material is directly related to the study aim, data obtained, or in support of conclusions drawn.

Table 1 summarizes how you should structure the sequence of slides for the podium presentation. If you are only given 8 min to present + 2 min for questions (10 min total), you can see that with 8 mandatory slides you are already at the limit of 1 min per slide. In due course, we will give you tips on how to reallocate time within your presentation to expand the Methods and, most importantly, the Results section as needed.

Basic structure for a podium presentation of an original paper

Always clarify study methods. Posters offer a greater freedom since you can show details of your experimental setup or the methodology of your study design. A podium presentation often requires abbreviated mention of key elements of design, scales, inclusion/exclusion criteria, intervention or dependent variables and outcomes. This requires diligent work with your coauthors and biostatisticians to make sure that you are brief but clear and sufficient.

A well-assembled Methods section will lead to a shorter Results summary since your clear statement of the study aim and key methodology logically leads to audience anticipation of the primary end-point findings. There are key messages and delivered data points that distinguish effective and clear presentations from those resulting in confusion and further guesswork.

Effective presenters capture audience attention and stay focused on key messages [ 1,2,3,6,7,8 ]. A study was performed at scientific conferences asking reviewers to identify the best features of effective presentations [ 3 . ]The most frequent comments on best features of presentations with respect to ‘content' were identifying a key concept (43% of presentations) and relevance (43%). Best features in evaluations of ‘slides' were clarity (50%), graphics (27.3%) and readability of the text and font size (23%). Finally, best features in ‘presentation style' were clarity (59%), pace (52%), voice (48%), engaging with the audience (43%), addressing questions (34%) and eye contact (28%) [ 3 ].

Here are some tips on how to avoid forcing yourself to rush during a talk. Before you start (usually in the intermission or just before your session) familiarize yourself with the podium and learn how to advance slides and operate the pointer or point with the mouse. If you stumble at the beginning, you start your presentation with a time deficit.

Get to the podium while you are being introduced and start right away (it is the responsibility of the moderator to properly announce you, your team and the title of the talk and it is the responsibility of the conference organizers to have your title slide showing during the moderator's announcement). Do not read or repeat your study title. Thank the moderators and while the title slide is showing you may consider briefly thanking your coauthors/mentor here in just a few seconds.

Show the ‘Conflicts of Interest' slide next and disclose if any conflicts are related to the study subject. If they exist, conflicts should be acknowledged briefly but clearly. Do not show a slide with several conflicts and tell the audience ‘here are my conflicts' and switch to the next slide. It is important to simply say, ‘pertinent to this study I have …' or ‘this study includes an off-label or investigational use of …'. Now you are logically ready to turn to the subject of your presentation.

Start with a brief summary of what is known and why is it important to investigate the subject. This -introduces the audience to the subject of research and starts the flow of logic. If you are facing a challenge to present a complex study within in a short allotted period of time (such as 8 min for podium or a just a few minutes during a guided poster tour), do not waste time. You may cut to the chase and simply say why you did the study. Coming with straight forward messages, which are authentic and concerned about the scientific question, gets you more credit with the audience than careful orchestration of a perceived equipoise. However, we have digressed.

For an effective message delivery, identify two people towards opposite far ends of the audience and speak as if you are personally talking to one of them at a time and alternate between them. If lights shining in your face are too bright, still look towards the back of the room (or from time to time directly into the camera if your talk is being shown on monitors in a large ballroom) and do not bury your head into the podium or notes that you might have brought with you. The nonverbal part of any presentation and the presenter's body language are also important [ 6 ]. At all cost avoid bringing notes with you to any scientific presentation since you should have practiced your talk enough to remember it or you should be familiar with the subject of your lecture to the point that even if you have just been woken up, you can still maintain an intelligent conversation. Do not count on ‘it will come to me' - practice your talk! Further advice on effective presenting skill is available [ 2 ].

Remember that at international conferences many attendees are not native English-speaking people. Thus speak slowly and train your voice for best possible pronunciation! This recommendation is applicable to natives of English-speaking countries too. Native English speakers from the UK, Commonwealth countries and the USA tend to speak fast, with a variety of accents that international audiences may not understand easily while the interpreters may not be able to keep up. When speaking, do not turn away from the audience and look at your slide projection on the main screen or at your poster all the time. If it is necessary to remind yourself what to talk about next, advance the slide, briefly glance at it, turn to the audience and continue your presentation. Turn to your slide again only if you have to use a laser pointer or a mouse on the computer screen. Do so briefly, underline the important finding, point to the key part of an image and avoid long circular pointer motions around the whole text line or big areas of graphic illustrations. It is distracting. Try to use the pointer only when necessary and do not read your slides with the pointer constantly aiming at where you are reading.

When presenting your methods, clearly state the type of study, e.g. retrospective analysis, case series, -cohort or controlled trials, etc., and describe patient inclusion/exclusion criteria. If too numerous, only list the major ones. As an example, in a clinical trial of a fibrinolytic agent the list of exclusion criteria could be very extensive, so how can you present this on a dime? Your slide should focus on the key inclusion criteria since a patient who did not have those was obviously excluded, and an audience at a stroke conference is generally familiar with multiple exclusion criteria for tissue plasminogen activator treatment. So, your slide or poster may have the following in it (highlighted in bold ) to which you may add the plain text in your (limited) verbal statements:

Our Major Inclusion Criteria: were

• total Pre-treatment NIHSS score >6 points

• Presence of mismatch on MRI determined by -( EPTITHET ) trial criteria

• Age <80 years and

• Time from symptom onset <8 h

After that, you may omit including a slide with the long list of exclusions in favor of time. If there is a -specific contraindication new to the treatment agent in your study, you could say ‘in addition to well-known contraindications for systemic thrombolysis, patients were excluded if they had …' at the end of showing the ‘Major Inclusion Criteria' slide as shown above. Similarly, in a poster, list only the most relevant inclusion and exclusion criteria and walk the audience through the methods without stumbling on too many detail -disclosures. The audience will lose track of where you are going.

It is important to keep a balance between sufficient disclosure of study methods and the length of this part of your presentation. It is always helpful if you have a prior study that used a similar or from which you developed your methodology that has already been published - you may show a reference to this study and move on faster without sacrificing the quality. For example, ‘ultrasound tests were done by experienced sonographers using a previously published standard protocol', ‘CT scans were read independently using the ASPECTS score', and ‘sICH was defined by the SITS-MOST criteria'. Say this while showing or pointing to the line and published source reference on your visual aid.

Clearly organize and deliver the Results section. Include absolute numbers and simple statistics before showing advanced analyses. Remember not to show data in Methods and equally so do not introduce new methods when presenting Results. As a rule, describe characteristics of the general study population or balance/imbalances between target and control groups. Follow this by a slide that shows the primary end-point findings or observations that directly address the study aim or research question. This follows the logic of a scientific presentation and will help you avoid deviations to side observations no matter how unexpected or valuable they seem. Stay the course, address the main question first and only then show additional findings. When presenting a poster, point to the area where the key results are displayed. Unlike a slide presentation or lecture where the audience is forced to see one slide at a time, busy posters could be distracting. Posters that are heavily packed with graphs, images, tables and text are often difficult to follow during a brief guided poster presentation tour. It is the presenter's responsibility to drive the audience attention to key results in a logical sequence. When you present a graph, start by telling the audience what is shown and in what units on each access, and briefly point to the numbers on each axis.

Remember to present one point at a time. It makes common sense but sometimes may be difficult to follow if complex experiments or studies with multiple confounding variables have to be navigated through a brief presentation. Do not lose sight of your original research question or the objective of your lecture. Remember what you have shown so far, and what logically should be shown next. If you are pressed on time or made a mistake while advancing slides, take a deep breath and relax. Clear state of mind will buy you time. Racing thoughts such as ‘I have to cover that and that, and oh, that too' are not helpful. Dry runs, or practice presentations are essential for you to master the material that you need to present.

After finishing the Results part of your presentation, remember not to introduce more new results in Discussion and Conclusions. That surprise is hard for the audience to process. If you'd like to reemphasize the main finding, use the following suggestion. Let's say your goal was to show the prevalence of a new syndrome in your study population and you found it to be 24% (your primary research question). Unexpectedly, you also found that patients with this syndrome have an increased risk of dying (RR 2.08, 95% CI 1.23-4.34). These numbers and statistics obviously belong to the Results section. However, you want to stress in your conclusion once again how important your finding is. You can present it as follows: ‘Conclusions: nearly a quarter of stroke patients can be affected by this new syndrome and, if present, it doubles the patient chance of dying in hospital'. This recaps the main finding and makes practical interpretation of the relative risk estimate.

Before you jump into Conclusions, however, we always encourage presenters to note and openly discuss current study limitations. This improves your own assessment for biases and ranking of the level of obtained evidence. If you do not disclose the obvious study limitations, you will most likely receive questions after your presentation that will point to these shortcomings. Thus, instead of a positive discussion of how your study advances our knowledge, the discussion with the audience will focus on shortcomings and the key message may be lost with the negative audience response. Unlike Twitter™ or future media-based quick popularity scores, science can only advance when it endures the highest scrutiny (even though in the future presenters may be concurrently judged by the audience as our technologies improve). Regardless, if you are a good scientist, prepare yourself to stand the ground if the evidence is behind you. Be proactive, acknowledge study limitations and how you attempted to control for biases, etc.

In a lecture or a podium talk or when standing by your poster, always think clearly, have a logical plan for presentation parts that should be covered next, gain audience attention, make them interested in your subject, excite their own thinking about the problem, listen to questions and carefully weigh the evidence that would justify the punch-line. This will support your conclusions!

With posters, we often see a Discussion section but no conclusions listed, or they are listed in the abstract but not in the poster itself. This will lead to an obvious question after you stop presenting: ‘So, what is your take on this?' Our advice is, have your conclusions listed and be prepared to defend them point-by-point as the question and answer part could be challenging. If you do not understand the question, ask for clarification rather than talk nonsense.

To arrive at the right conclusions, you have to rank scientific evidence in your presentation appropriately. What may seem obvious may turn erroneous or more complex at a closer look by experts. Helpful hints here include you maintaining careful documentation while you are conceiving the project, designing it with your colleagues and consulting with a biostatistician on all steps taken in ascertaining the study population, interventions, end-point data collection and bias verification. Put all methodological issues against your findings and this will give you an idea of the strengths and weaknesses of your study. Preparing and delivering your presentation is a great experience to see if your knowledge and gained expertise stand up to peer scrutiny.

Rehearse your presentation before you deliver it at a conference. Challenge yourself to dry runs with your most critically thinking colleagues. Quite often, it is not the presentation itself but these questions, comments and subsequent late night debates with your colleagues that bring new thinking, advance our understanding and spark new ideas. This is the chance to transform your own current thinking and that of your peers. Think about your upcoming presentation, whether it is a podium, poster or lecture, as an opportunity, a launch pad, a reward for the hard work you did to bring this project to the attention of the scientific community.

When time comes, ace it with a clear mind, precise execution and fund of knowledge.

Before his first oral presentation in English, Dr. Alexandrov was nervous and asked his mentor, Dr. John W. Norris, for a dry run. Dr. Norris generously came to listen to him at 10 p.m. the night before, and Dr. Alexandrov survived his talk.

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The Essential Guide to Error-Checking and Reviewing Presentations

An overlooked skill for data scientists (and not only).

Dimitris Panagopoulos

Towards Data Science

Everyone who works in data science is aware that data storytelling is a crucial skill. There are thousands of books, articles, and posts about it. It is common to have a section devoted to it in a Data Science course. We are told that when presenting data, we should tell a story using the right graphs, gently guiding our audience.

What we are not told, probably because it is obvious, is that our presentation should be correct! And since nobody talks about this, we are never taught to error-check a presentation. I believe that this is a crucial skill that is overlooked.

Letting errors slip into a presentation can have dire consequences. Failing to make the audience understand the data analysis results is the least severe one. A presentation with mistakes will make the presenter appear sloppy at least, ignorant or deceitful at worst. It will eat away his or her credibility.

Please note that when I say a presentation should be “correct” I am not just referring to using the proper statistical analysis tools, or the appropriate machine learning algorithms. Maybe a better word is that a presentation should be “consistent” with itself. An element in a slide should not…

Written by Dimitris Panagopoulos

Research mathematician turned to Data Scientist https://www.linkedin.com/in/dpanagopoulos/

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