Natesan Batley Prathiba, Contractor Ateka A, Compton Sidonia E, Sharma Rachita, Dranger Paula
Department of Counseling Psychology and Human Development, University of Louisville.
Department of Psychology, University of North Texas.
Psychol Trauma. 2024 May;16(4):676-685. doi: 10.1037/tra0001309. Epub 2022 Aug 4.
The Posttraumatic Stress Disorder (PTSD) Checklist for DSM-5 (PCL-5) is frequently used to assess PTSD symptoms. Extending its psychometric investigations across distinct samples (United States and India), the aims of the present study included investigating the item characteristics, person fit, and differential item functioning (DIF) across the two samples.
We (a) conducted item analysis using the graded response model to examine item characteristics (thresholds and discrimination parameters) and (b) examined person fit to determine participants' response patterns. The U.S. sample included 176 trauma-exposed individuals seeking mental health treatment, and the Indian sample included 148 trauma-exposed ex-military personnel.
Results indicated low discrimination for Item 8 and low but acceptable discrimination for Item 17 for the U.S. and Indian samples, respectively. Across both samples, the most unused response categories were the middle-point or extreme (higher severity) categories (all response categories were better utilized in the Indian sample), and half the participants exhibited person misfit. Supplemental DIF analysis indicated that five items exhibited DIF indicating potential item bias; however, effect sizes for DIF were negligible.
Although the PCL-5 demonstrated strong psychometric properties and showed promise for use across the samples differing on cultural and demographic characteristics, some of the items and the number of categories used to measure them could be revisited to create a more efficient instrument. (PsycInfo Database Record (c) 2024 APA, all rights reserved).
《精神疾病诊断与统计手册》第5版创伤后应激障碍检查表（PCL - 5）常用于评估创伤后应激障碍症状。本研究旨在将其心理测量学调查扩展到不同样本（美国和印度），包括调查两个样本中的项目特征、个体拟合度和项目功能差异（DIF）。
我们（a）使用等级反应模型进行项目分析，以检验项目特征（阈值和区分参数），（b）检查个体拟合度以确定参与者的反应模式。美国样本包括176名寻求心理健康治疗的受创伤个体，印度样本包括148名受创伤的退役军人。
结果表明，美国和印度样本中，第8项的区分度较低，第17项的区分度较低但可接受。在两个样本中，最未被使用的反应类别是中点或极端（更高严重程度）类别（印度样本中所有反应类别得到了更好的利用），并且一半的参与者表现出个体不拟合。补充的DIF分析表明，有五项表现出DIF，表明存在潜在的项目偏差；然而，DIF的效应大小可以忽略不计。
尽管PCL - 5表现出强大的心理测量学特性，并有望用于文化和人口特征不同的样本，但可以重新审视其中一些项目及其用于测量的类别数量，以创建一个更有效的工具。（《心理学文摘数据库记录》（c）2024美国心理学会版权所有）
