The Wechsler scales are among the most widely used tests in cognitive and neuropsychological assessments. When assessing children aged 6:0-7:7 years the clinician can choose between Wechsler Preschool and Primary Scale of Intelligence - Fourth Edition (WPPSI-IV) and Wechsler Intelligence Scale for Children - Fifth Edition (WISC-V). Information about how the tests function and differ in this overlapping age range is limited. Using a between-subjects design, the present study compared the cognitive profiles of typically developing Swedish-speaking children in Finland in this overlapping age range (6:1 - 7:2 years), assessed with the Swedish versions of either WPPSI-IV ( 38) or WISC-V ( 24). Profile analyses and one-way ANCOVA were performed to investigate differences in the comparable subtests, indexes and Full Scale IQ. On the subtest level, children assessed with WISC-V had significantly lower scores on the subtests Vocabulary, Matrix Reasoning, and Bug/Symbol Search compared to children assessed with WPPSI-IV. On the index level, scores for the Verbal Comprehension Index and the Fluid Reasoning Index were significantly lower for children assessed with WISC-V. The Full Scale IQ was significantly lower on WISC-V. Taken together, the findings indicate that WPPSI-IV and WISC-V produce partly different cognitive profiles. These differences are important to recognize when choosing which test to use and when interpreting the results of clinical assessments of children in this age group.
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