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
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.
Rovira A, Auger C, Naidich TP. How to prepare an oral presentation and a conference. Radiologica 2013 ; 55 (suppl 1): 2 -7S.