Department of Psychology, University of Toledo, Toledo, OH 43606-3390, USA.
Psychol Assess. 2009 Dec;21(4):629-34. doi: 10.1037/a0016677.
The authors examined the effects of a methodological manipulation on the Posttraumatic Stress Disorder (PTSD) Checklist's factor structure: specifically, whether respondents were instructed to reference a single worst traumatic event when rating PTSD symptoms. Nonclinical, trauma-exposed participants were randomly assigned to 1 of 2 PTSD assessment conditions: referencing PTSD symptoms to their worst trauma (trauma-specific group, n = 218) or to their overall trauma history in general (trauma-general group, n = 234). A 3rd group of non-trauma-exposed participants (n = 464) rated PTSD symptoms globally from any stressful event. Using confirmatory factor analysis, the authors show that the 4-factor PTSD model proposed by D. W. King, G. A. Leskin, L. A. King, and F. W. Weathers (1998; separating effortful avoidance and emotional numbing) demonstrated the best model fit for trauma-general and non-trauma-exposed participants. The 4-factor PTSD model proposed by L. J. Simms, D. Watson, and B. N. Doebbeling (2002; emphasizing a general dysphoria factor) demonstrated the best model fit for trauma-specific participants. Measurement invariance testing revealed that non-trauma-exposed participants were different from both trauma-exposed groups on factor structure parameters, but trauma groups were not substantially different from each other.
作者研究了一种方法操作对创伤后应激障碍（PTSD）检查表的因素结构的影响：具体来说，就是当评估 PTSD 症状时，被试是否被指示参考单一的最严重创伤事件。非临床创伤暴露参与者被随机分配到 PTSD 评估条件的 2 种条件之一：参考最严重创伤的 PTSD 症状（创伤特异性组，n = 218）或一般的整体创伤史（创伤一般性组，n = 234）。第 3 组非创伤暴露参与者（n = 464）从任何压力事件中整体评估 PTSD 症状。作者使用验证性因子分析表明，D. W. King、G. A. Leskin、L. A. King 和 F. W. Weathers（1998）提出的 4 因素 PTSD 模型（将努力回避和情感麻木分开）为创伤一般性和非创伤暴露参与者提供了最佳的模型拟合。L. J. Simms、D. Watson 和 B. N. Doebbeling（2002）提出的强调一般不适因素的 4 因素 PTSD 模型为创伤特异性参与者提供了最佳的模型拟合。测量不变性检验表明，非创伤暴露参与者在因素结构参数上与创伤暴露组不同，但创伤组之间没有实质性差异。
