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Assessment of Executive and Non-executive Functions Using Wechsler Scales

Abstract

One of the critical defects of Wechsler scales is its insensitivity to executive functions. However, not all subtests of Wechsler scales are completely insensitive to executive functions, but some subtests are relatively sensitive to executive functions. The goal of the present study was to devise a method to compare executive and non-executive functions using Wechsler scales. A validity study using schizophrenic patients indicated that Block Design and Digit Symbol are relatively sensitive to executive functions, whereas Information and Comprehension are insensitive to executive functions. A normative study was also performed to provide normative data for comparing the average of Block Design and Digit Symbol with the average of Information and Comprehension. Even Wechsler subtests that are relatively sensitive to executive functions were less sensitive to executive functions than specialized executive-function tests. These results indicate that assessment of executive functions based on Wechsler scales is clinically useful but not sufficiently sensitive to executive functions. Thus, use of specialized executive-function tests is essential to properly assess executive functions.

keywords
Wechsler intelligence test, neuropsychological test, executive functions, Wechsler intelligence test, neuropsychological test, executive functions, Wechsler지능검사, 관리기능, 실행기능, 신경심리검사인지기능의 평가가 요구되는 거의 모든 임상심리검사에서 Wechsler지능검사가 포함된다. Wechsler지능검사는 우수한 신뢰도와 규준자료, 축적된 연구 결과 등 여러 장점을 가진다. 그러나 Wechsler지능검사에도 여러 제한점은 있다. Wechsler지능검사의 가장 큰 제한점의 하나는 관리기능(executive function, ‘실행기능’으로도 번역됨)에 대한 둔감성이다(Fille

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