AGE-DIFFERENCES IN WISC-III SUBTESTS OF CHILDREN EXPERIENCING ACADEMIC DIFFICULTIES

WISC-III subtest scores of 180 children referred because of academic d ifficulties were analyzed for differences based on age (M = 9.6, SD = 2.7) and IQ. Rank-orders of all subtests indicated no significant corr elations across the six age IQ groups, suggesting that interpretation of changes in subtest rankings may require consideration of age and IQ , especially for such children. When data were organized into Acquired Knowledge, Spatial Ability, and speed-related task categories, analys es of variance showed a main effect for IQ. Furthermore, scores on Acq uired Knowledge were associated with age at the lower category of IQ, whereas Spatial Ability and speed-related tasks were not related to ag e.