My DD's FSIQ on the WISC is 135 or 136 and her GAI is 150 (155 if you calculate extended norms). The below 100 processing speed (with a particularly bad coding score) pulled her down a lot for FSIQ. Working memory was Ok at 96th percentile. I don't understand why the WISC puts so much emphasis on processing speed as a factor of intelligence. But processing speed is not going to affect achievement that much unless the achievement test is timed. She hasn't had the WIAT so I'm not sure how she'd do.
