Malingered Posttraumatic Stress Disorder (PTSD) and the Effect of Direct Versus Indirect Trauma Exposure on Symptom Profiles and Detectability

Abstract

Posttraumatic stress disorder (PTSD) is arguably prone to malingering due to its subjective and heterogeneous nature. Various factors can influence PTSD symptom profiles including trauma type and trauma exposure. However, it is unknown whether trauma exposure influences malingered PTSD symptom profiles. We used a malingering simulation design with trauma type controlled to compare (1) PTSD symptom profiles (Posttraumatic Stress Checliklist-5; PCL-5) at the syndrome, symptom cluster, and individual symptom levels and (2) symptom validity profiles (Structured Inventory of Malingered Symptomatology; SIMS) at the overall and subscale level, as a function of direct and indirect trauma exposure. Seventy-three participants were randomly assigned to either the direct (“witnessed” trauma) or indirect (“learned about” trauma) condition. Participants were coached about symptoms and instructed to simulate PTSD. PCL-5 profile analyses revealed that simulators in the direct exposure group reported greater overall PTSD severity. Significant differences were found on cluster D (changes in cognition and mood) and individual symptoms including intrusive thoughts, amnesia, difficulty experiencing positive emotions, and risk-taking. No differences were identified for any other symptom scores nor for the symptom validity profile, except for the SIMS total score (direct: M = 33.0, SD = 12.8, indirect: M = 26.5, SD = 13.9, t(71) = 2.06, p = .043, d = .48). These findings indicate that trauma exposure can influence malingered PTSD profiles at the syndrome, symptom cluster, and individual symptom levels (small effects), but, with one exception for a summary score, it does not produce a detectable difference on symptom validity testing. This study may provide insight for clinicians into the how malingered PTSD profiles can manifest as a result of direct and indirect trauma exposure; however, further research is strongly indicated.