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이준석 ( Joon-suk Yi ),유재연 ( Jae-yeon Yoo ) 대구대학교 한국특수교육문제연구소 2004 특수교육저널 : 이론과 실천 Vol.5 No.3
The purpose of this study was to examine the theoretical factor structure of adaptive behavior using exploratory and confirmatory factor analysis with EWHA-VABS (EWHA-Vineland Adaptive Behavior Scales). Exploratory factor analysis of subscale variables produces one factor solution. AMOS 5 was used for confirmatory factor analysis. The χ2 tests of fits of one factor model, three factor model to the observed data and χ2 difference tests between one factor model and three factor model were conduced. A ratio of χ2 to df, GFI, AGFI, NFI were used for alternative goodness-of-fit index considering for the possible impact of sample size on χ2 tests. The goodness of fit of one factor model and three factor model to the model reproduced by empirical data were favorable. Three factor model was less parsimonious than one factor model, but the former was more fitted than the latter.
이준석 ( Joon-suk Yi ) 대구대학교 한국특수교육문제연구소 2005 특수교육저널 : 이론과 실천 Vol.6 No.3
The purpose of this research was to conduct item validity analysis of a motor area of developmental screening inventory assessing developmental state of preschoolers. Explorations of item analysis (item difficulty and discrimination) and item internal consistency yielded evidence of content validity. The motor ability of the infants until 35 months increased gradually, and 54 month afters it appeared with the fact that the motor ability maintains a stable level. Each item also reflected an age change appropriately. Against the result regarding gender difference was discussed.
구조방정식모형을 활용한 K-WAIS-IV 보충소검사 대체가능성 검증
이준석 ( Joon-suk Yi ) 한국발달장애학회 2012 발달장애연구 Vol.16 No.4
본 연구의 목적은 구조방정식모형의 다중모형비교절차를 이용하여 한국 웩슬러 성인용 지능검사 4판(K-WAIS-Ⅳ)에 있는 보충소검사의 심리측정적 대체가능성을 검토하는데 있다. 이를 위해 K-WAIS-Ⅳ 기술 및 해석요강에 보고된 소검사간 평균 상호 상관행렬자료를 이용하여 각 지수별 보충소검사의 심리측정적 대체능력을 분석하였다. 각 지수별로 보충소검사와 핵심소검사간 대체가능성이 다른 것으로 나타났다. 언어이해지수에서는 [이해] 보충소검사가 [어휘] 및 [상식] 핵심소검사와 심리측정적으로 완벽한 호환성을 가지고 있는 것으로 나타났으며, 지각추론지수에서는 [무게비교] 보충소검사가 [행렬추론] 핵심소검사와 심리측정적으로 완벽한 호환성이 있는 것으로 나타났다. 작업기억지수의 경우에는 [숫자] 핵심소검사가 [순서화] 보충소검사를 대체할 수 있는 것으로 나타났고, 처리속도지수의 보충소검사 [지우기]는 핵심하위검사들과 요인동일성을 지니고 있지 않은 것으로 나타났다. This research was designed to determine the psychometric evidence for repl acing core subtests with supplementary subtests of Korean Wechsler Adult I ntelligence Scale, Fourth Edition (K-WAIS-Ⅳ) by using confirmatory factor analysis. WAIS-Ⅳ(and K-WAIS-Ⅳ) was markedly different from its predece ssors in terms of item content and structure. The latest revision includes six new subtests, eliminates the VIQ and PIQ, and provides factor-based indexes in addition to a FSIQ. The 10 core subtests are grouped into four domain in dex (Verbal Comprehension, Perceptual Reasoning, Working Memory, Processi ng Speed). And there are five supplemental subtests that may be substituted, if necessary, for one or more of the core subtests. The hypothetical factor st ructure of the K-WAIS-Ⅳ was supported in these analyses. But the psycho metric evidence does not support the substitutability of supplementary subtests of Verbal Comprehension, Perceptual Reasoning, Working Memory, and Proce ssing Speed.
확인적 요인분석을 활용한 K-WISC-Ⅳ 보충소검사의 심리측정적 대체가능성 검증
이준석 ( Joon Suk Yi ) 한국정서·행동장애아교육학회(구 한국정서학습장애아교육학회) 2014 정서ㆍ행동장애연구 Vol.30 No.4
이 연구의 목적은 다중모형비교절차를 이용하여 한국 웩슬러 아동용 지능검사4판(K-WISC-Ⅳ)에 있는 보충소검사의 심리측정적 대체가능성을 검토하는데 있다. K-WISC-Ⅳ는 언어이해, 지각추론, 작업기억, 처리속도 등의 4개의 지표를 중심으로 10개의 주요소검사와 5개의 보충소검사로 구성되어 있으며, 각 지표별로 보충소검사와 주요소검사간 대체가능성이 다른 것으로 나타났다. 언어이해지표에서는 [상식] 보충소검사는 [공통성] 주요소검사와 심리측정적으로 완벽한 호환성을 가지고 있으며, [단어추리] 보충소검사는 [어휘] 주요소검사와는 심리측정적으로 완벽하게 호환되는 것으로 나타났다. 지각추론지표의 경우, [빠진곳찾기] 보충소검사는 [토막짜기] 주요소검사와 심리측정적으로 완벽한 호환성이 있고, 동일한 구인을 측정하고 있으므로 대체사용이 가능한 것으로 나타났다. 작업기억지표의 경우에는 [산수]보충소검사가 [숫자]나 [순차연결] 주요소검사를 대체할 수 없는 것으로 나타났고, 처리속도지표의 [선택] 보충소검사도 주요소검사들을 적절히 대체할 수 있는 심리측정적 근거를 가지지 못한 것으로 나타났다. This research was designed to determine the psychometric evidence for replacing core subtests with supplementary subtests of Korean Wechsler Intelligence Scale for Children, Fourth Edition (K-WAIS-Ⅳ) by using multiple models comparison of confirmatory factor analysis. WISC-Ⅳ (and K-WISC-Ⅳ) was markedly different from its predecessors in terms of item content and structure. The latest revision includes five new subtests, eliminates the VIQ and PIQ, and provides factor-based indexes in addition to a FSIQ. The 10 core subtests are grouped into four domain index (Verbal Comprehension, Perceptual Reasoning, Working Memory, Processing Speed). And there are five supplemental subtests that may be substituted, if necessary, for one or more of the core subtests. There are significant substitutabilities between (a) ‘Similarities’ core subtest and ‘Information’ supplementary subtest, (b) ‘Comprehension’ core subtest and ‘Word Reasoning’ supplementary subtest of Verbal Comprehension. And there is complete substitutability between ‘Block Design’ core subtest and ‘Picture Completion’ supplementary subtest of Perceptual Reasoning. However, the psychometric evidence does not support the substitutability of supplementary subtests of Working Memory and Processing Speed.
이준석 ( Joon Suk Yi ) 대구대학교 한국특수교육문제연구소 2008 특수교육저널 : 이론과 실천 Vol.9 No.1
The purpose of this study was to evaluate the validity of Kongju Early Developmental Assessment System-Screening Test (KEDAS-S) as a developmental screening instrument by examining the specificity, sensitivity, and agreement index as well as overrefferral and underreferral rates. This study also investigated the KEDAS-S identification rate of children who need special services among participating children. A total of 92 children ages between 3-5 were sampled for this research. Korean K-ABC and K-DIAL3 were administered to the children after the KEDAS-S test. Sensitivity and specificity results were obtained from the use of cut-off scores. The results indicated that the KEDAS-S correctly identified 50 % of the children who might need special services, demonstrating high rates of sensitivity. The optimal sensitivity achieved with the IQ 70 of K-ABC and all cut offs of K-DIAL 3, demonstrating 97% accuracy of identifying the children. The results also indicated that the KEDAS-S identified correctly more than 94% of the children who may not need special services, regardless of the cut-off scores, demonstrating high rates of specificity. The overall agreement index of the KEDAS-S was .96-.97. It was found that the overreferral rates of KEDAS-S were 5% and underreferral rates were 1%.