30-Second interval performance on the coding subtest of the WISC-III: Further evidence of WISC folklore?

Abstract

Data gathered from 351 students administered the WISC-III were used to analyze the 30-s-interval performance on the WISC-III Coding subtest. Interpretation methods that focus on the relevance and meaning for such interval differences were examined. Because of the lack of "base-rate" data, the suitability of interpreting the Coding subtest intervals is questioned. Results, based both on IQ and special education classification, revealed no significant difference in performance. Cautions regarding the diagnostic use of the 30-s Coding intervals are discussed. © 1998 John Wiley & Sons, Inc.