Advanced Clinical Interpretation of the WAIS-IV and WMS-IV: Prevalence of Low Scores Varies by Level of Intelligence and Years of Education

Clinicians can use the base rates of low scores in healthy people to reduce the likelihood of misdiagnosing cognitive impairment. In the present study, base rates were developed for the Wechsler Adult Intelligence Scale—Fourth Edition (WAIS-IV) and Wechsler Memory Scale—Fourth Edition (WMS-IV) using...

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Veröffentlicht in:Assessment (Odessa, Fla.) Fla.), 2011-06, Vol.18 (2), p.156-167
Hauptverfasser: Brooks, Brian L., Holdnack, James A., Iverson, Grant L.
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container_title Assessment (Odessa, Fla.)
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creator Brooks, Brian L.
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description Clinicians can use the base rates of low scores in healthy people to reduce the likelihood of misdiagnosing cognitive impairment. In the present study, base rates were developed for the Wechsler Adult Intelligence Scale—Fourth Edition (WAIS-IV) and Wechsler Memory Scale—Fourth Edition (WMS-IV) using 900 healthy adults and validated on 28 patients with moderate or severe traumatic brain injuries (TBIs). Results indicated that healthy people obtain some low scores on the WAIS-IV/WMS-IV, with prevalence rates increasing with fewer years of education and lower predicted intelligence. When applying the base rates information to the clinical sample, the TBI patients were 13 times more likely to be identified as having a low cognitive profile compared with the controls. Using the base rates information is a psychometrically advanced method for establishing criteria to determine low cognitive abilities on the WAIS-IV/WMS-IV.
doi_str_mv 10.1177/1073191110385316
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subjects Adolescent
Adult
Alberta
Brain Injuries - diagnosis
Clinical Diagnosis
Cognition Disorders - diagnosis
Cognitive Ability
Confidence Intervals
Control Groups
Educational Status
Female
Head Injuries
Humans
Incidence
Intelligence
Male
Measures (Individuals)
Memory
Memory Disorders - diagnosis
Memory, Short-Term
Middle Aged
Neurological Impairments
Patients
Psychometrics
Scores
Wechsler Adult Intelligence Scale
Wechsler Scales
Young Adult
title Advanced Clinical Interpretation of the WAIS-IV and WMS-IV: Prevalence of Low Scores Varies by Level of Intelligence and Years of Education
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