Cross-validation of incidental learning tasks from the WAIS-IV as a measure of memory

Abstract

Although incidental learning (IL) routinely occurs in everyday life, it is infrequently assessed during neuropsychological evaluations. This study aimed to further examine the concurrent validity of IL measures based on the Vocabulary and Similarities subtests from the Wechsler Adult Intelligence Test-Fourth Edition (WAIS-IV). Participants included 43 Veterans referred for outpatient neuropsychological testing. Performances on the IL procedures correlated strongly with performances on the Repeatable Battery for the Assessment of Neuropsychological Status Immediate and Delayed Recall Indices (r = .48 to r = .78). These results indicate that the IL procedures from selected WAIS-IV subtests provided an efficient and valid measure of memory. In particular, the task based on the Similarities subtest provided exceptionally high value as a screen for memory problems. These IL procedures, which require minimal additional administration time, capitalize on the semantic encoding that is inherent in completing the Vocabulary and Similarities subtests, and offer a complementary approach to standard memory assessment.

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