thanks G3. Yes it's difficult to know what is cause and effect or correlation or something other animal entirely. My DS had PSI 109 and WMI about 125. the only thing I see is possibly math computation yet he can reason through basic algebra problems, has had abstract thought, makes leaps in thought very quickly as far as chemistry and physics...I really only see slower processing in computation. I tend to think it's laziness on his part b/c he doesn't ever want to practice. He sees no reason to be quick on computation so he won't practice. He's a stubborn boy.