Even sermons can't save slides

I just came across a fascinating study on the use of PowerPoint. The purpose of the study was to determine if using slides would enhance recall of information presented in a non-classroom field setting—in this case religious sermons.

The study examined four test conditions to determine the congregation’s (audience’s) recall of information presented. They tested recall of:
  1. A sermon that used slides with words only.
  2. A sermon using visual images on slides.
  3. A sermon that used a combination of visual images and words on slides.
  4. A sermon that used spoken words only—no slides.
After each sermon, the congregation completed a quiz to determine how much they remembered.

When they completed their statistical analyses, the researchers concluded that their “results indicated that the form of PowerPoint presentation had some effect on recall of information communicated in the sermons.

“Interestingly, the most effective form of communication—insofar as enhancing recall was concerned—was the use of words only in the presentation, with some minor positive results for the use of words combined with visual images.

“Visual images alone were of limited value in enhancing recall, and were less effective in influencing recall than were sermons presented without the use of PowerPoint.

“Poor PowerPoint format detracted from recall, but positive PowerPoint formats were not effective in increasing recall.”

In other words, use as many slides as you wish, as long as you don’t want the audience to remember what you said.

If you want to increase what the audience remembers (and who on earth wouldn’t?), turn off the projector. Don’t share your slides. Simply carry on a conversation with your audience.


less presentation more conversation