EDIT: dead link
I think IQ is possibly an indicator of dualisation. In fact most EF types have low IQ, and most IT types have high.
That means that if I have an IQ of 126, I should dualise with someone who has an IQ of 79. 1/1.26=.79
That doesn't mean that woman isn't cool. She has just a low IQ. lololol
BTW, this could even explain why sometimes LII-SEE couples aren't that "conflicting".