WAIS–IV, WISC–V, WPPSI–IV Subtests and their Relationship with CHC Theory

Abstract

Psychometric intelligence tests have great importance for identification and diagnosis of learning problems, high talents, and cognitive profile in the context of developmental delay or brain injury impacts, for the orientation of specialized education. Among these tests are the three scales of Wechsler, which used frequently. From, the first to the last edition of Wechsler, tests based being, on the created g factor of Spearman. The Cattell-Horn-Carroll theory (CHC) is a complete psychometric theory and empirically based on the structure of cognitive skills. It’s used widely as a basis for the creation and classifying batteries of administration intelligence and neuropsychological tests to facilitate interpretation of cognitive performance. For organizing assessments for people suspected of having an intellectual disability, also three Wechsler tests are based on this theory. Our study tends to classify all subtests in the last three American edition versions of the Wechsler tests in this critical theory and compare these tests. We found that the five of The Wechsler Intelligence Scale for Children–Fifth Edition WISC-V primary indexes align with Gc (Comprehension knowledge), Gv (Visual and Spatial Thinking), Gf (Fluid Reasoning), Gwm (Working Memory), Gs (Processing Speed). As well Glr (long-term memory) is measured by two complementary indexes: the Naming Speed Index (NSI) and Symbol Translation Index (STI). Meanwhile, in The Wechsler Preschool and Primary Scale of Intelligence Fourth edition WPPSI-IV, The Wechsler Adult Intelligence Scale-Fourth Edition WAIS-IV and The Wechsler Intelligence Scale for Children–Fourth Edition WISC-IV. The only five primary indexes are aligning with Gc, Gv, Gf, Gwm, and Gs, and This proved that there existed more factors present in the WISC-V than the previous Wechsler test editions.