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WAIS-IV Seven-Subtest Short Form: Validity and Clinical Use in ă Schizophrenia

Abstract : Objective: This study assesses the psychometric properties of Ward's ă seven-subtest short form (SF) for WAIS-IV in a sample of adults with ă schizophrenia (SZ) and schizoaffective disorder. ă Method: Seventy patients diagnosed with schizophrenia or schizoaffective ă disorder were administered the full version of the WAIS-IV. Four ă different versions of the Ward's SF were then calculated. The subtests ă used were: Similarities, Digit Span, Arithmetic, Information, Coding, ă Picture Completion, and Block Design (BD version) or Matrix Reasoning ă (MR version). Prorated and regression-based formulae were assessed for ă each version. ă Results: The actual and estimated factorial indexes reflected the ă typical pattern observed in schizophrenia. The four SFs correlated ă significantly with their full-version counterparts, but the Perceptual ă Reasoning Index (PRI) correlated below the acceptance threshold for all ă four versions. The regression-derived estimates showed larger ă differences compared to the full form. The four forms revealed ă comparable but generally low clinical category agreement rates for ă factor indexes. All SFs showed an acceptable reliability, but they were ă not correlated with clinical outcomes. ă Conclusions: The WAIS-IV SF offers a good estimate of WAIS-IV ă intelligence quotient, which is consistent with previous results. ă Although the overall scores are comparable between the four versions, ă the prorated forms provided a better estimation of almost all indexes. ă MR can be used as an alternative for BD without substantially changing ă the psychometric properties of the SF. However, we recommend a cautious ă use of these abbreviated forms when it is necessary to estimate the ă factor index scores, especially PRI, and Processing Speed Index.
Keywords : quality
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https://hal.archives-ouvertes.fr/hal-01482379
Contributor : Pascal Auquier <>
Submitted on : Friday, March 3, 2017 - 3:16:18 PM
Last modification on : Wednesday, October 14, 2020 - 4:23:21 AM

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Ewa Bulzacka, John E. Meyers, Laurent Boyer, Tifenn Le Gloahec, Guillaume Fond, et al.. WAIS-IV Seven-Subtest Short Form: Validity and Clinical Use in ă Schizophrenia. Archives of Clinical Neuropsychology, Oxford University Press (OUP), 2016, 31 (8), pp.915-925. ⟨10.1093/arclin/acw063⟩. ⟨hal-01482379⟩

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