For you Psych and smart people out there: What's the difference? The world of psychology claims that MMPI is the best, but of course WE know better! But do they even measure the same thing? And why is any info on the MMPI so hush-hush? I am simply curious if anyone has taken it, or knows anything about the MMPI, and how/if it relates at all to the MBTI. I think I already know the answer, but I wanna know what you all think. Actually, any information on the MMPI would be useful.