Tuesday 13 May 2014
Your audience will mentally check out of your next 'PowerPoint presentation' after about 10 minutes. Given a presentation of moderately interesting content, your audience’s attention will 'plummet to near zero' after 9 minutes and 59 seconds, according biologist John Medina at the University of Washington School of Medicine. “Before the first quarter-hour is over in a typical presentation, people usually have checked out,” says Medina who cites peer-reviewed studies to reinforce this observation.