As far as our brains are concerned visual content trumps everything else, according to neuroscientist John Medina in his book Brain Rules. Because of the ways in which our brains process information, visual content is potentially the most powerful media we can deliver.
But “visual content” does not include text on a screen. Reading text is hard work, which can quickly become tiresome.
Bottom line for presenters: combine clear, emotionally-engaged narration with meaningful visuals and minimal screen text to help keep your audiences awake and interested.