A Cluster Analytic Study of the Wechsler Intelligence Test for Children-IV in Children Referred for Psychoeducational Assessment Due to Persistent Academic Difficulties

Corinne Hale · Janet Casey · Philip W. Ricciardi

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Developmental and Educational Neuropsychology Psychological Testing and Assessment Cognitive Abilities and Testing

Abstract

Wechsler Intelligence Test for Children-IV core subtest scores of 472 children were cluster analyzed to determine if reliable and valid subgroups would emerge. Three subgroups were identified. Clusters were reliable across different stages of the analysis as well as across algorithms and samples. With respect to external validity, the Globally Low cluster differed from the other two clusters on Wechsler Individual Achievement Test-II Word Reading, Numerical Operations, and Spelling subtests, whereas the latter two clusters did not differ from one another. The clusters derived have been identified in studies using previous WISC editions. Clusters characterized by poor performance on subtests historically associated with the VIQ (i.e., VCI + WMI) and PIQ (i.e., POI + PSI) did not emerge, nor did a cluster characterized by low scores on PRI subtests. Picture Concepts represented the highest subtest score in every cluster, failing to vary in a predictable manner with the other PRI subtests.

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References

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2016Difficulties in reading and neuropsychological profile on WISC-IVin Italian children

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