I re-tested a gifted student using WISC–IV UK and the scores were lower than previously reported on WISC-III uK. Why is this?
This is due to the difference in the core subtests between WISC–III UK and WISC–IV UK; core subtests in the WISC–IV UK reflect the increased emphasis on fluid reasoning, working memory, and processing speed in more recent conceptualisations of intelligence. The removal of the Information subtest from the core battery reduces the contribution of crystallised knowledge to the FSIQ. The addition of Picture Concepts and Matrix Reasoning subtests results in a much stronger element of fluid reasoning. On the WMI (formerly called FDI on WISC–III UK), Letter-Number Sequencing replaces Arithmetic, a subtest on which intellectually gifted students tended to score highly, due to school based learning of mathematical skills. One additional processing speed subtest was added to the core battery (SS). Gifted students tend not to score as high on processing speed subtests relative to other indices, perhaps due to an approach to problem solving that stresses accuracy over speed of performance. In addi
