How is the FSIQ on WISC-IV UK different than the FSIQ on WISC-III UK?
Compared to the WISC–III UK, the WISC–IV FSIQ deemphasises crystallised knowledge (Information is supplemental), and increases the contribution of fluid reasoning (Matrix Reasoning and Picture Concepts), working memory (Letter–Number Sequencing), and Processing Speed (both Coding and Symbol Search). The WISC–IV UK FSIQ is composed of all 10 subtests that comprise the four index scores, including additional measures of working memory and processing speed. The WISC–III FSIQ included only one measure of processing speed and one measure of working memory in the FSIQ.
