People don’t remember what you say in presentations.
That’s a fact. As a keynote speaker and trainer, I find it to be a sad fact.
But it’s been proven. Researchers had people listen to a 10-minute presentation, then followed up to test their recall. Here are the percentages of how much people remembered at various times:
This was for a 10-minute presentation. We can assume less retention after an hour-long presentation.
Please select this link to read the complete blog post from John Millen.