Trial testimony from Dr. William Wilkins (1993):
WILKINS: My conclusion was that Jessie reasons on the level of about a, between a six to eight year old. That is what is called a very concrete style of thinking. By concrete I mean is that is an inability to do abstracts, to envision the world in terms of things that I have had concrete experience with. So things are taken and dealt with very literally. Let me give you an example. Another example is that if you have a small child and you tell them, Dont eat any cookies before supper. And you watch, and they go to the cookie jar and get cookies and eat them before supper. And you say to that child, I told you not to get any cookies before supper. And the kid says, I didnt do it. And youre baffled cause you saw them do it. If you question the child for awhile longer hell say to you, I was hungry and got something to eat. And for the child literally, literally, he did not get things when he should not have done so. He got something to eat because he was hungry. It is that very literal, absolute, direct definition of what the world is.
CROW: All right, doctor. Did you do any evaluations of Mr. Misskelley on his reading level?
WILKINS: Yes I did.
CROW: What were those results?
WILKINS: Uh, at the third grade level.
CROW: Ok, what about his writing level?
WILKINS: At about the point seven level, that means less than first grade.
CROW: Ok, what about his verbal comprehension?
WILKINS: Yes, Jessie has, one of the things we looked at was I read him a short story and asked him to give me details from that. Jessie was able to give one or two details out of a possible 12, 14, depending on the story: a very, very impaired ability to do those kinds of things. Jessie, basically, after a, after a seven or eight word sentence begins to lose whats happening. For example, on the first page of the second confession that he did, hes asked, All right, you told me earlier it was around seven or eight. Which time was it? Jessie responds, It was seven or eight. That is, he got the last half of the sentence.
(Google WM3 trial transcripts to read the full testimony.)
ETA: Regardless of whether or not some feel Jesse functioned at a higher intellectual level, this was still a 17 year old boy with a mean IQ of 72, questioned for 12 hours, with neither a parent or an attorney present, with much of that interogation NOT recorded by investigators. Does that seem kosher to anyone here?