Therapeutic Science for Rehabilitation (재활치료과학)

Korean Society of Neurological Occupational Therapy (대한신경계작업치료학회)
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Item-Level Psychometrics of the 12 Items of the Coping Orientation to Problems Experienced Scale

스트레스 대처 척도 12개 항목에 대한 심리측정 속성

  • Nam, Sanghun (Dept. of Occupational Therapy, Graduate School, Yonsei University) ;
  • Hilton, Claudia L. (Dept. of Nutrition, Metabolism and Rehabilitation Sciences, University of Texas Medical Branch) ;
  • Lee, Mi-Jung (Dept. of Rehabilitation Science, University of Texas Medical Branch) ;
  • Pritchard, Kevin T. (Dept. of Rehabilitation Science, University of Texas Medical Branch) ;
  • Bae, Suyeong (Dept. of Occupational Therapy, Graduate School, Yonsei University) ;
  • Hong, Ickpyo (Dept. of Occupational Therapy, College of Software and Digital Healthcare Convergence, Yonsei University)
  • 남상훈 (연세대학교 일반대학원 작업치료학과) ;
  • ;
  • 이미정 (텍사스대학교 의과대학 재활과학과) ;
  • ;
  • 배수영 (연세대학교 일반대학원 작업치료학과) ;
  • 홍익표 (연세대학교 소프트웨어디지털헬스케어융합대학 작업치료학과)
  • Received : 2022.02.25
  • Accepted : 2022.05.16
  • Published : 2022.08.31
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Abstract

Objective : This study examined the psychometric properties of the 12-item Coping Orientation to Problems Experienced Scale (COPE) using Rasch analysis. COPE is one of the instruments used to measure stress-coping skills. Methods : The study participants were 480 community-dwelling older adults. We tested the instrument's unidimensionality assumption using principal component analysis (PCA). Item fit was examined using infit-and-outfit mean-square (MnSq) and standardized fit statistics (ZSTD). The precision and item difficulty hierarchies of the instrument were examined. The item-difficulty hierarchy was investigated to identify the easy and difficult items. We tested differential item functioning (DIF) for sex and age groups. Results : PCA revealed that the instrument met the unidimensionality assumption (eigenvalue = 1.78). Among the 12 items, item 2 was removed because of misfit (Infit MnSq = 1.33, Infit ZSTD = 5.05, Outfit MnSq = 1.56, Outfit ZSTD = 7.15). The remaining 11 items demonstrated a conceptual item-difficulty hierarchy. The person strata value was 3.10, which is equivalent to a reliability index value of 0.81. There was no DIF for the sex and age groups (DIF contrast <0.27). Conclusion : The findings indicated that the revised COPE-11 has adequate item-level psychometric properties and can accurately measure stress coping skills.

목적 : 본 연구는 라쉬 분석을 이용하여 12개 항목의 스트레스 대처 척도의 항목 심리측정 속성을 조사하고자 하였다. 연구방법 : 본 연구는 ICPSR(Inter-university Consortium for Political and Social Research)에서 제공하는 공공 자료를 활용하여 로스엔젤레스에 거주하는 노인 480명을 대상으로 조사하였다. 주성분 분석을 사용하여 척도의 일반적 요인을 조사하였다, 라쉬 분석의 내·외적합 지수의 제곱평균(Mean Square)과 표준값(ZSTD)를 통해 항목 적합도를 알아보고, 척도의 신뢰도와 쉬운 항목과 어려운 항목을 식별하기 위해 항목-난이도 계층을 조사하였다. 마지막으로 성별과 연령 그룹에 대해 차등 항목 기능을 조사하였다, 결과 : 주성분 분석을 통해 스트레스 태처 척도의 12개 항목이 하나의 요인으로 구성되었음을 가정하였다. 라쉬 분석을 통하여 항목 2번이 부적합한 결과로 제거되었다(내적합 제곱평균=1.33, 내적합 표준값=5.05, 외적합 제곱평균=1.56, 외적합 표준값=7.15). 항목 2번을 제외한 11개 항목의 평가자 층(Person Strata)은 3.10으로 신뢰도 지수 0.81에 해당하는 값을 보였다. 차등 항목 기능을 조사한 결과 성별과 연령 그룹에 대한 차등 항목 기능은 없었다. 결론 : 라쉬 분석을 통해 개정된 COPE-11은 항목 간 심리측정 속성이 적절하여 측정 시 시간 단축과 정확한 측정이 가능할 것으로 사료된다.

Keywords

Acknowledgement

This research was supported by the BK21 FOUR (Fostering Outstanding Universities for Research) funded by the Ministry of Education (MOE) of the Republic of Korea and National Research Foundation of Korea (NRF) (Big data specialized education and research team for cognitive health and social integration of community-dwelling older adults)

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