Both my daughters are great at puzzles and other things that lead me to expect PRI to be a strength, but both did quite poorly (relatively) on the picture based portions of the WISC (matrix reasoning, picture concepts). They both performed as I expected on comparable sections of the SB5. And i have since learned that the both have visual processing issues. I have concluded that the WISC showed their visual processing weakness, while the sb5 showed their visual/spatial reasoning strength...