Over the last several months I've given a life-times worth of PowerPoint presentations! Okay, that's not true...it just seemed like it, both to me and, perhaps, to my audiences.
Bert Decker points out some interesting research about PowerPoint presentations; every missionary presenter should be aware of this.
Researchers at the University of NSW found that the brain cannot process written and spoken information well at the same time...The principle finding among some of the other controversial conclusions is "It is more difficult to process information if it is coming at you in the written and spoken form at the same time."
He goes on to explain that the researchers found that slides that contained the same text that was being spoken were not effectively processed by the audiences minds.
So stop with using PowerPoints with so much text! Use graphics, charts, pictures, symbols and the like - because they also found in their research that "It is effective to speak to a diagram, because it presents information in a different form."
This is a pretty significant finding since many presenters use their slides as talking points, if not as their complete set of notes. While I don't use a lot of text on my slides, I confess that I've used bullet points as reminders of what to say during the presentation. If I want to communicate effectively, I shouldn't do this.
Good luck, and remember to use more charts, pictures and symbols.