A colleague commented that people appear to better absorb and remember lists when they are in groups of odd numbers (as opposed to even numbers). This includes bulleted PowerPoint slides, verbalized lists, and lists developed on whiteboards and other media.
I’ve noted, personally, that there appears to be a “power of three” effect – that people remember lists of three items very well. Conversely, we certainly know that a list of 10 words is very tough to remember…!
As a self-test, it would be interesting to read and compare/contrast your own marketing literature’s bulleted lists of features/benefits with that of your competition or related third parties…
Does anyone have feedback, comments or data regarding the effectiveness of remembering odd-numbered lists vs. even?