Wais IV Matrix Reasoning and Vocabulary Assessing premorbid functioning with the WAIS-IV Matrix Reasoning and Vocabulary subtests versus the North American Reading Test (NART).
Performance on a cognitive test can be viewed either as measuring a unitary function or as reflecting the operation of multiple factors. Individual subtests in batteries designed to measure human abilities are commonly modeled as a single latent factor. Several latent factors are then used to model groups of subtests. However, these latent factors are not independent as they are related through hierarchical or oblique structures. As a result, the simple structure of subtest performance results in complex latent factors.
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