Construct validity of the item-specific deficit approach to the California verbal learning test (2nd Ed) in HIV infection

Clin Neuropsychol. 2012;26(2):288-304. doi: 10.1080/13854046.2011.653404. Epub 2012 Mar 7.

Abstract

Impairment in list learning and recall is prevalent in HIV-infected individuals and is strongly predictive of everyday functioning outcomes. Consistent with its predominant frontostriatal pathology, the memory profile associated with HIV infection is best characterized as a mixed encoding/retrieval profile. The Item-Specific Deficit Approach (ISDA) was developed by Wright et al. (2009) to elicit indices of Encoding, Consolidation, and Retrieval from the well-validated California Verbal Learning Test (CVLT; Delis, Kramer, Kaplan, & Ober, 1987, 2000). The current study evaluated construct validity of the ISDA for the CVLT-II in 40 persons with HIV-associated neurocognitive disorders (HIV+/HAND+), 103 HIV-infected persons without HAND (HIV+/HAND-), and 43 seronegative comparison participants (HIV-). Results provided mixed support for the construct validity of ISDA indices. HIV+/HAND+ individuals performed significantly more poorly than persons in the HIV+/HAND- and HIV- groups on ISDA Encoding, Consolidation, and Retrieval deficit indices, which demonstrated adequate classification accuracy for diagnosing HIV+/HAND+ participants and evidence of both convergent (e.g., episodic memory) and divergent (e.g., motor skills) correlations in the HIV+/HAND+ participants. However, highly intercorrelated ISDA indices and traditional CVLT-II measures showed comparable between-groups effect sizes, classification accuracy, and correlations to other memory tests, thereby raising uncertainties about the incremental value of the ISDA approach in clinical neuroAIDS research.

Publication types

  • Research Support, N.I.H., Extramural
  • Validation Study

MeSH terms

  • Adult
  • Aged
  • Cognition Disorders / etiology
  • Cognition Disorders / psychology*
  • Cognition*
  • Female
  • HIV Infections / complications
  • HIV Infections / psychology*
  • Humans
  • Male
  • Memory, Episodic
  • Middle Aged
  • Neuropsychological Tests
  • Verbal Learning*