Objective: Accurate interpretation of neurocognitive performance validity tests (PVTs) requires information regarding whether African-Americans (AA) are at increased risk of false identification as non-credible. Method: The current study examined whether AA (n = 51) and Caucasian (n = 103) patients differed on several dedicated and embedded PVTs: Dot Counting Test, b Test, Warrington Recognition Memory Test – Words, Rey Word Recognition Test, Digit Span (Age Corrected Scaled Score, Reliable Digit Span, 3-digit time, 4-digit time), Digit Symbol Recognition Equation, Wechsler Memory Scale-III Logical Memory Equation, Comalli Stroop, Wechsler Adult Intelligence Scale-III (WAIS-III) Picture Completion (Most Discrepant Index), Rey-Osterrieth (RO) Effort Equation, Rey Auditory Verbal Learning Test (RAVLT) Effort Equation, RAVLT/RO discriminant function, Rey 15-item plus recognition, and Wisconsin Card Sorting Test Failure to Maintain Set. Exclusion criteria included compensation-seeking, dementia/amnestic disorders, and low intelligence (WAIS-III Full Scale IQ [FSIQ] < 70). Results: Caucasians scored significantly higher (p > .05) than AA on six tests (Digit Span 3-digit and 4-digit time, Digit Symbol Recognition Equation, Logical Memory Effort Equation, Stroop [A and B], Dot Counting E-score, and b Test E-score). However, groups also differed on FSIQ (96.6 versus 85.4). When subjects with borderline IQ (70 to 79) were excluded (resulting in 93 Caucasians and 27 AAs), groups no longer differed in IQ (98.9 versus 94.3), and only differed on the Dot Counting Test E-score (11.70 versus 13.03). The Dot Counting E-score cut-off was associated with 88.5% specificity in the AA group. Conclusion: Apparent differences between AA and Caucasians on PVT scores appear to be moderated by IQ scores. When participants are limited to those with low average IQ or higher (>80), minimal group differences are detected that do not appear to have clinical relevance.
Ethnic Differences in the Detection of Feigned Cognitive Symptoms: A Comparison of Neuropsychological Assessment Performance Validity Tests between African-Americans and Caucasians
E Hood, D Boone, D Miora; C-52
Ethnic Differences in the Detection of Feigned Cognitive Symptoms: A Comparison of Neuropsychological Assessment Performance Validity Tests between African-Americans and Caucasians. Arch Clin Neuropsychol 2015; 30 (6): 581. doi: 10.1093/arclin/acv047.254
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