Wechsler PIQ-VIQ discrepancy in childhood and adulthood: The difference between performance and verbal IQ scores was explored in those individuals who were able to complete both Wechsler Performance and Verbal IQ scales as children or adults. In childhood (n = 20), the median PIQ > VIQ difference was 11 points and in adulthood (n = 33) the median difference was 4 points. However, at both ages, there was great individual variation in the size of the discrepancy [range in childhood = +46 (i.e. P > VIQ) to 30 (i.e. V > PIQ); range in adulthood +50 (P > VIQ) to 38 (V > PIQ)] and the size of the discrepancy was not significantly smaller in adulthood than in childhood (Mann–Whitney z = .569; p = .57).