Constans Joseph I, Kimbrell Timothy A, Nanney John T, Marx Brian P, Jegley Susan, Pyne Jeffrey M
Southeastern Louisiana Veterans Health Care System.
Division of Health Services Research, Central Arkansas Veterans Healthcare Center.
J Abnorm Psychol. 2014 Feb;123(1):81-90. doi: 10.1037/a0035100. Epub 2013 Nov 25.
The current study investigated in a sample of Operation Enduring and Iraqi Freedom (OEF/OIF) veterans how a symptom overreporting response style might influence the association between PTSD diagnostic status and color-naming response latency for trauma-related stimuli during the Modified Stroop Task (i.e., the Modified Stroop Task effect, MST effect). It was hypothesized that, if an overreporting response style reflected feigning or exaggerating PTSD symptoms, an attenuated MST effect would be expected in overreporters with PTSD as compared with PTSD-diagnosed veterans without an overreporting style. If, however, overreporting stemmed from high levels of distress, the MST effect might be greater in overreporters compared with those with a neutral response style. The results showed that veterans with PTSD and an overreporting response style demonstrated an augmented MST effect in comparison with those with a more neutral style of response. Overreporters also reported greater levels of psychopathology, including markedly elevated reports of dissociative experiences. We suggest that dissociation-prone overreporters may misattribute emotional distress to combat experiences leading to the enhanced MST effect. Other possible explanations for these results are also discussed.
本研究在持久自由行动和伊拉克自由行动（OEF/OIF）退伍军人样本中，调查了症状过度报告反应风格如何影响创伤后应激障碍（PTSD）诊断状态与改良斯特鲁普任务（即改良斯特鲁普任务效应，MST效应）期间与创伤相关刺激的颜色命名反应潜伏期之间的关联。研究假设，如果过度报告反应风格反映了伪装或夸大PTSD症状，那么与无过度报告风格的PTSD诊断退伍军人相比，有PTSD的过度报告者的MST效应预计会减弱。然而，如果过度报告源于高度痛苦，那么与具有中性反应风格的人相比，过度报告者的MST效应可能更大。结果表明，与反应风格更中性的退伍军人相比，患有PTSD且有过度报告反应风格的退伍军人表现出增强的MST效应。过度报告者还报告了更高水平的精神病理学，包括解离体验报告明显升高。我们认为，易解离的过度报告者可能将情绪困扰误归因于战斗经历，从而导致MST效应增强。还讨论了这些结果的其他可能解释。
