Gifted Issues Discussion homepage Forums Identification, Testing & Assessment What does the difference between WISC & WIAT mean?

There are far too many confounding factors to draw a conclusion along those lines. At the very least the WISC should be testing an untrainable ability, whereas the WIAT is testing a trainable skillset. That means that the higher end of the WIAT results would also include high motivation/high achievers effectively depressing scores.