Did he have the WJ cognitive? Or just the WJ achievement? If he has hand to paper kinks, fluency scores will be low. They test very little in the way of "smarts". The real meat for the WJ is in the passage comprehension and applied problems scores. Calculation shows math knowledge too, but it's pencil/paper testing, and could reflect a lower score if that is an issue.
They did cog and achievement. The tests they gave are: long term memory, short term memory, visual processing, logic and reasoning, executive processing speed, word attack, and auditory processing.
