Welcome!
You've received a great answer from aeh. I'll just add that if a picture or diagram is helpful, here are a few resources found online, which show how Processing Speed fits in, and is revealed by the WISC:
- WISC-V framework is found online
here.
- Older WISC-IV subtests can be seen in this
document about calculating GAI.
A brief roundup on IQ testing:
- Hoagies list of
Psychologists familiar with Testing the Gifted and Exceptionally Gifted-
Test prep articles - one by Aimee Yermish, one by Nadia Webb
