Symptom burden, validity, and cognitive performance in Iraq and Afghanistan veterans.

Applied Neuropsychology. Adult
Sarah L MartindaleJared A Rowland

Abstract

The present study evaluates the complex relationships between symptom burden, validity, and cognition in a sample of Iraq and Afghanistan veterans to identify key characteristic symptoms and validity measures driving cognitive performance. We hypothesized that symptom and performance validity would account for poorer outcomes on cognitive performance beyond psychological symptoms. Veterans (n = 226) completed a cognitive test battery, Personality Assessment Inventory (PAI), Word Memory Test (WMT), and Miller Forensic Assessment Symptom Test (M-FAST). Partial least squares structural equation modeling (PLS-SEM) modeled the fully-adjusted relationships among PAI subscales, validity, and cognitive performance. 23.45% of participants failed validity indices (19.9% WMT; 7.1% M-FAST). PLS-SEM indicated PAI subscales were not directly associated with performance or symptom validity measures, and there were no direct effects between validity performance and cognitive performance. Several PAI subscales were directly associated with measures of verbal abstraction, visual processing, and verbal learning and memory. Contrary to hypotheses, symptom and performance validity did not account for poorer outcomes on cognitive performance beyond ...Continue Reading

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