Abstract

Objective: A multitude of studies have examined the relationship between the MMPI-2 and failed cognitive symptom validity testing (SVTs). Little has been done, to date, to examine similar relationships between the Personality Assessment Inventory (PAI) and SVTs in military samples with remote history of concussion. This study examines common distortion indicators on the PAI including Infrequency (INF), Negative Impression Management (NIM), Malingering Index (MI), and Roger's Discriminant Function (RDF) and failure on ≥2 SVTs. Method: Forty Service Members (SMs) underwent neuropsychological evaluation in a Department of Defense TBI Clinic [98% Army; 95% males; mean (SD) age was 37.9 (7.9); 40% Caucasian, 35% African American, 18% Hispanic; mean (SD) years of education was 13.7 (2.2); 70% noncomissioned officers; mean (SD) number of deployments was 2.9 (2.7)] - all with remote history of LOC .17). Average (SD) T-score on PAI MI for the failed ≥2 SVTs group was 61.7 (12.2) as compared to 52.8 (12.1) for the passing SVT group (t = −2.19; p = .03). Conclusion(s): Apparent effortful distortion on the PAI, as evidenced by the Malingering Index, was correlated with noncredible performances on SVTs in concussed SMs who underwent neuropsychological evaluation.