At last, a study that proves what you already knew about PowerPoint:
“Slide presentations as speech suppressors: When and why learners miss oral information,” Christof Wecker, Computers & Education (2012) [abstract]
There’s a nice summary by Eric Horow, but here it is in bullet points:
- If your slides aren’t brief, you should
- A) Speak without them, or
- B) Put the entire presentation on slides and don’t say a word.
We’ve always liked Guy Kawasaki’s rule of thumb: 10 slides, 20 minutes, 30-point font.
What happens when your slides aren’t concise?
