Diagnostic Utility of WISC-IV General Abilities Index …

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Journal of Applied School Psychology, 28:133 154, 2012Copyright Taylor & Francis Group, LLCISSN: 1537-7903 print / 1537-7911 onlineDOI: Utility of WISC-IV General AbilitiesIndex and Cognitive Proficiency IndexDifference Scores Among Children With ADHDSARAH E. DEVENAArizona State University, Tempe, Arizona, USAMARLEY W. WATKINSBaylor University, Waco, Texas, USAThe Wechsler Intelligence Scale for Children-Fourth Edition Gen-eral Abilities Index and Cognitive Proficiency Index have been ad-vanced as possible Diagnostic markers of attention deficit hyper-activity disorder. This hypothesis was tested with a hospital samplewith attention deficit hyperactivity disorder (n=78), a referredbut nondiagnosed hospital sample (n=66), a school sample withattention deficit hyperactivity disorder (n=196), a school matchedcomparison sample (n=196), and a simulated standardizationsample (n=2,200). On the basis of receiver operating charac-teristic analyses, the General Abilities Index -Cognitive ProficiencyIndex discrepancy method had an area under the curve of (a).

Diagnostic Utility of WISC-IV 135 Past research has shown three main cognitive subtest score patterns linked to ADHD. First, Kaufman (1994) found a profile of low scores on

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