Really there are different situations to cope with. You can be at a scientific conference (usual time 12 minutes plus discussion), you have to present for an examination or to get your graduation (time depending of which one, from few minutes to 45 minutes plus discussion). Each one of the occasions is different and your contents have to be tailored to it.
As Academia StackExchange writes, you have to answer a few questions:
Who is my audience? What is their prior knowledge? Why are they there and what are their motivations for attending/reading? What do they want to take away from you provide them with?
What is my own motivation? Do I want to teach them something new? Do I want to illustrate how smart I am? Do I want to give an overview of a field that everyone in the audience should understand, or do I want to impress a few key people?
- Put your audience at the center
- A presentation is not a paper (even if it can share it overall structure)
- Do not overwhelm the audience (with data, formulas, concepts)
- Tell your story
- evoke questions
- encourage people to learn more about your work
A starting point in your process of stepping away from the PowerPoint precipice I can recommend is some cool advice from David J.P. Phillips. In his entertaining and informative TEDx Talk, David shares five design principles that will cognitively and psychologically optimize your PowerPoint slides. These design principles are:
- One message per slide
- Use slides as props for you to deliver your message, not the other way round
- The most important part of your slide should be the biggest
- Use contrast to focus the viewer's attention and a black slide background
- No more than six objects per slide “ (My note: I use at most three and standardize some places where people know where to find lateral or further information)
"
Personally blessing Open Science, I also add some further attentions:
- Always put the references (the needed ones) and provide a link to them
- Advertise that your slides are photo friendly
- Tell people where they can find your presentation eventually for further inspection
- One is the design of the layout of your slides. I prefer simplicity over complicate layouts. As already said, no more than three objects in a slide. I usually have two bands, at top and bottom, and usually a white core. On the to band I put the title of the slides or a phrase that helps to connect it to others, or sometimes, a joke or a comment. On the bottom I put the mane of the slides’s Authors, the copyright (in my case creative commons) to let know the people that the can reuse my slides, following some rules (not sure that people respect it).
- The other is the graphics, plots, drawings, that contains scientific messages. These graphics have to be self-explanatory, clear, with fonts larger than those on papers (if possible). For other informations of figures in scientific writing see, for instance, here.
- Use very few words. We recommend no more than six lines of type per slide, with at most seven words per line. Try translating statements into bullet statements or an outline. Keep the wording tight; use simple language, minimal jargon terminology, and short, uncomplicated sentences. Even removing small words can make a big difference (e.g., say “assay results” rather than “results of assays”). Remember that you will also be speaking to your audience. These slides are visual support of what you are saying, not a substitute for your oral presentation.
- Choose the right font. Use a typeface that is easy to read, such as Times New Roman, Arial or Courier. If you are a Macintosh user avoid fonts that do not go across platforms, such as Helvetica. Studies show that text written in all capital letters is hard to follow; it is better to use bold print than all caps. Use the same typeface throughout your presentation. We recommend using 1.5 spacing so that the lines are easier to follow. Then use a font that is about as large as the slide will accommodate, for example title lines size 44, major text 32, and minor text 24.
- Choose the right color(s), keeping in mind that 1/8 of your audience is color blind, on average. We recommend using contrasting colors, light type on a dark background or vice versa, like white on cobalt blue, or dark green on a pale yellow. Avoid red type - it looks good on your computer but is virtually impossible to read off of the slide screen. And at all costs avoid bright yellow as a background, it is blinding for everyone.
Often, it is said that focusing on what you want want to say, instead of what the audience is interested in hearing is a pitfall. However, you do not have to misunderstand this message: the audience wants to hear about your research. "Tell them “One of the most common mistakes I see in people giving presentations is that they present only information I already know. This usually happens when they spend nearly all of the presentation going over the existing literature and giving background information on their particular case. You need only to discuss the literature with which you are directly engaging and contributing. Your background information should only include what is absolutely necessary. If you are giving a 15-minute presentation, by the 6th minute, you need to be discussing your data or case study. At conferences, people are there to learn about your new and exciting research, not to hear a summary of old work."
Finally "presentations often include interactions in the dorm of questions and answers. This is a great opportunity to provide whatever additional information the audience desires. For fear of omitting something important, most speakers try to say too much in their presentations. A better approach is to be selective in the presentation itself and to allow enough time for questions and answers and, of course, to prepare well by anticipating the questions the audience might have.
A last topic
The last topic I want to cover is the presence of equations in your slides. I found on Academia Stack Exchange the following that I share:
"I teach in a mathematical field (statistics) and I always encourage my students to minimise equations in their presentations, and never present equations that they are not going to go through and explain clearly to the audience. Sometimes basic equations showing your model form are useful, but sometimes you can give an explanation without the aid of mathematics. In any case, you should only show equations if they assist the audience in understanding your work, and if you are willing to take time in your presentation to go through each equation and explain it.
Including mathematical equations in a presentation solely to "show the complexity of the research" (i.e., show off) is academic masturbation. It bamboozles the audience for the purpose of aggrandising the speaker. Don't do it --- push back on their suggestion to the contrary.”
I have to say that sometimes I did it (maybe was an overreactions) with the intention to contrast the idea that my discipline was sliding to much towards a descriptive aptitude that I see as a betray of its core based on physics. I strongly believe that equations are necessary, but they are a highly specialized compressed form to represent physical reality and explaining them requires a lot of time and, probably requires different technicalities with respect, to the more general scientific discourse. Therefore I encourage you to be aware that when you put an equation you have to meditate about it. As Bill Dietrich once said to me: one equation and you loose one reader (was referred to papers), one graphic and you gain one.
Convey the meaning of equations and their treatment in slides requires another post, I guess.
- A paper for helping you
- Verbal and non verbal communication and other tips
- Do not overwhelm the audience
- Nice suggestions, still the presentation violates some rules, I guess
- A set of resources
- From Northwestern University
- Other videos googleing