Many people have opinions about PowerPoint, but few can speak on the topic with the authority of psychology professor Mayer.

The author of 18 books and more than 250 articles, Mayer's 12 years of research in multimedia learning and problem solving have important implications for PowerPoint users.

As a presenter, shift away from expressing your individual style of communicating. Instead, adapt your presentation to the audience's style of decision-making. If you're not doing this, you're losing the other side of the desk.