본 연구는 PTSD 증상을 측정하는 PCL-5(외상 후 스트레스 장애 체크리스트-5) 척도의 심리측정적 속성을 확인하고자 하였다. 이를 위해 일반성인 908명을 대상으로 PCL-5의 요인구조를 확인하고 신뢰도와 타당도를 검증하였다. 먼저, 확인적 요인분석을 통해 1요인, 4요인, 6요인, 7요인의 모형검증을 실시하였고 Kline(2015)이 제시한 모형적합도의 기준에 따라 수용가능한지 확인하고 모형적합도의 수치를 비교하여 상대적으로 좋은 모형을 확인하였다. 분석결과, 1요인은 모형적합도가 나쁜 것으로 나타났다. 4요인, 6요인, 7요인은 모두 모형적합도가 수용 가능한 수준이었으며, 그 중 7요인이 가장 좋은 적합도 수치를 보이는 것으로 확인되었다. 다음으로 신뢰도를 확인하기 위해 내적 신뢰도, 개념 신뢰도, 분산추출지수를 검토하였으며, 타당도를 확인하기 위해 유사하게 PTSD 증상을 측정하는 한국 외상 후 스트레스 선별 평가지(K-PC-PTSD-5) 척도 및 PTSD 증상과 관계성이 확인된 단축형 간이정신진단 검사-18과의 상관분석을 실시하였다. 분석결과, PCL-5의 신뢰도는 우수한 것으로 확인되었으며 K-PC-PTSD-5 및 단축형 간이정신진단 검사-18의 우울, 불안, 신체화 증상과 정적상관을 보여 동시 타당도가 확인되었다. 마지막으로 본 연구결과에 기반하여 논의를 기술하고 시사점을 제시하였다.
This study examined the psychometric properties of the Korean version of the Posttraumatic Stress Disorder Checklist for DSM-5 (PCL-5), which measures posttraumatic stress disorder (PTSD) symptoms. To this end, 908 Korean adults were administered the instrument, and data were examined for factor structure, reliability, and validity. First, verification of model factors 1, 4, 6 and 7 were conducted through confirmatory factor analysis. The results indicated that factor 1 had poor goodness of fit, while factors 4, 6 and 7 were acceptable. Next, internal reliability, construct reliability, and average variance extracted were examined to confirm reliability. Additionally, correlation analyses were conducted with the Korean version of the Primary Care PTSD Screen for DSM-5 (K-PC-PTSD-5) and Brief Symptoms Inventory-18 to confirm validity. The analyses indicated that the reliability of the Korean version of the PCL-5 was excellent and that it positively correlated with the K-PC-PTSD-5, depression, anxiety, and somatization of Brief Symptoms Inventory-18. The implications of this study are discussed.
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