Poster Abstracts

Abstract

Grooved Pegboard (GP) has been validated as a performance validity test (PVT), and GP performance is correlated with self-reported psychiatric symptoms. The present study evaluated whether GP can incrementally predict symptom exaggeration beyond memory-apparent PVTs. Participants (N = 111) were military personnel and were predominantly White (84%), male (76%), with a mean age of 43 (SD = 12) and 16 years of education (SD = 2). Individuals with disorders potentially compromising motor dexterity were excluded. Participants were administered GP, memory-apparent PVTs (Medical Symptom Validity Test, Non-Verbal Medical Symptom Validity Test, Reliable Digit Span), and a symptom validity test (Personality Assessment Inventory Negative Impression Management [NIM]). On a hierarchical regression, non-dominant hand GP t-score incrementally predicted NIM over memory-apparent PVTs, using conventional cutoffs (F (2, 108) = 9.08, p < .001, R2 change = .08, β = -0.29, p < .01). When GP performance was dichotomized using raw cutoff scores (29 for either hand, 31 for both), non-dominant hand GP again predicted NIM over memory-apparent PVTs (F (2, 108) = 10.58, p < .01, R2 change = .10, β = -0.32, p < .01). Results indicated that noncredible GP performance adds incremental value over memory-apparent PVTs in predicting psychiatric symptom exaggeration.

First AuthorJeremy Jinkerson
Second AuthorLisa H Lu
Third AuthorKennedy Jan
Fourth AuthorPatrick Armistead-Jehle
Fifth AuthorRobert A Seegmiller