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Article Abstract
Objective: Posttraumatic stress is a significant issue facing military service members and can negatively impact working memory (WM), which is critical for performance success. Yet, few studies have examined the link between self-reported posttraumatic stress symptoms (PTSS) and WM performance in active-duty military cohorts. The present study utilized hierarchical linear modeling to examine this relationship by considering PTSS and underlying symptom clusters as well as WM demands related to load and affective interference in an active-duty military cohort ( = 515).
Method: PTSS severity was assessed via the posttraumatic stress disorder checklist-military version (PCL-M), and behavioral performance was measured on a delayed-recognition WM task that manipulated mnemonic load (low vs. high load) and affective interference (negative combat-related vs. neutral civilian images presented during the delay interval).
Results: Examination of the relationship between PCL-M and WM performance demonstrated that higher total PCL-M scores (especially higher numbing and hyperarousal symptoms) were associated with poorer WM task performance, = -0.083, = .003, 95% CI [-0.137, -0.029], even after controlling for combat experiences and previous deployment status. This relationship was stronger on trials with negative, = -0.114, < .001, 95% CI [-0.175, -0.054], compared to neutral distracters, = -0.052, = .093, 95% CI [-0.112, 0.009].
Conclusions: These results suggest that PTSS are associated with performance costs on a WM task with combat-related negative distracters. Broadly, these findings highlight the need to address PTSS in active-duty cohorts and further investigate vulnerabilities related to cognitive demands and psychological health. (PsycInfo Database Record (c) 2022 APA, all rights reserved).
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