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Scientific Communication Blog

Short Vs. Long Presentations - and The Winner is...

12/9/2017

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Mark Twain's quote should drive our behavior: “If you want me to give you a two-hour presentation, I am ready today. If you want only a five-minute speech, it will take me two weeks to prepare.” I teach scientific presentations, and I let the participants choose between a 7 minute presentation with a maximum of 7 slides including title and conclusion,  and a four minute presentation with a maximum of 5 slides. The second slide in each scenario is always the highly visual "hook" slide.
 It does take more time to prepare 5 slides than it takes to prepare 7. More filtering, more focus, more thinking  is required - as illustrated in Mark Twain's quote. The returns on your time investment are high however. The success rate  and the number of questions at the end of your presentation are inversely proportional to the number of slides.
​Why is less more?

Here are three good reasons.
  • 1. By focusing on the essential, highly specific details requiring a higher prior knowledge of the topic are left out. Less is more. 
  • 2. By setting audience interest instead of audience knowledge as your goal, the number of questions is greater. Interest can be generated in fewer slides and more visually than knowledge.
  • 3. As the number of slides increases, the distance increases between the title (the bull's eye in a target) and each new slide (a new ring moving away from the center). The audience is losing the main thread set by the title. Attention is divided.
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    Author

    After running a research center for Apple, I now write books on scientific writing and scientific presentations. I also conduct seminars to help scientists in life science and engineering science effectively promote their work. The way one promotes one's scientific achievements today, has evolved much since I started teaching 20 years ago. 

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