During our webinars and presentations, we often ask audiences to participate in a memory test. Here’s how it works: we put a slide containing a lot of words on the screen for 20 seconds. Then we take the slide away and ask everybody to write down as many words as they can remember. We’ve repeated this memory test hundreds of times over the years for audiences ranging from under a dozen people to several hundred. The results have been amazingly consistent. No matter where or when we do this, the vast majority of people are able to recall 5 to 9 words.