George Jensen and John DiTiberio, the authors of Personality and the Teaching of Composition, give examples of the "genius" that each of the types brings to their writing, and the kinds of mistakes that each of the types is prone to. This issue is for writers and non-writers alike, because it's very specific about the strengths and weaknesses of your communication style, and what to do about them.

"People used to say to me, 'I don't know what the heck you're talking about,'" says Ann, an Intuitive. "I'd say, 'It's simple, for example...' Then they'd say, 'Well, why didn't you say that in the first place?'"