KEDI-WISC와 K-WISC-III 의 구조 및 측정 동일성 검증: 임상표본을 대상으로
Testing configural and metric invariance between the KEDI-WISC and K-WISC-III: In a clinical sample
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본 연구에서는 동형찾기를 제외한 Korean Wechsler Intelligence Scale for Children-III (K-WISC-III)와 KEDI-WISC 자료의 구조 및 측정 동일성 여부를 검증하였다. 연구 1에서는 이전 연구에서 밝혀진 4개의 대안 모형 중에서 동형찾기를 제외한 WISC 자료에 가장 부합되는 모형을 확인하였다. 확인적 요인분석 결과, 임상장면의 환아 표본(228명)에서 KEDI-WISC와 동일하게 동형찾기를 제외한 K-WISC-III 자료의 위계적인 3요인구조 모형이 가장 적합함이 밝혀졌다. 이는 두 version의 지능검사 간 구조 동일성이 있음을 시사한다. 연구 2에서는 위계적인 3요인 모형의 요인계수들이 연구 1의 K-WISC-III 자료와 이전 연구의 KEDI-WISC 자료 간에 동등한 지를 알아보기 위한 측정 동일성 가설을 검증하였다. 그 결과, 두 지능검사 자료의 요인 구조 및 대부분의 요인 계수들(기호쓰기 소검사 제외)이 동일하다는 부분 측정 동일화 모형이 지지되었다. 이 결과들은 KEDI-WISC에서 사용되었던 다양한 해석적 접근을 K-WISC-III에서도 그대로 사용할 수 있음을 시사한다.
Abstract
We examined whether is invariant across the factor structure the Korean Wechsler Intelligence Scale for Children(K-WISC-III) and the KEDI-WISC and explored that the factor loadings are equal across the two scales with clinical samples. In study 1, four models about factor structure of the WISC reported in previous studies were evaluated with confirmatory factor analysis(CFA) on the data of 228 clinical samples. A hierarchical three-factor model was considered to be most appropriate as well as parsimonious in describing the data of the K-WISC-III. This result is suggested that there would be configurally invariant between the two scales. In study 2, metric invariance across clinical samples of the K-WISC-III in study 1 and clinical samples of the KEDI-WISC in our recent study was tested. Partial metric invariance across samples was confirmed after one second-order estimates(digit symbol) proving to be nonequivalent were not constrained. The results indicated that both factor structure and most factor loadings of the two version of Wechsler Intelligence scale are invariant across the two clinical samples. Moreover it is possible that various interpretations in KEDI-WISC is applied to the K-WISC-III.
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