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KMID : 0389420190270010082
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Korean Journal of Stress Research
2019 Volume.27 No. 1 p.82 ~ p.90
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Effects of Changing Items in Intelligence Test on Distribution of Norm Group and Computation of Standardized Score: Focused on Digit Symbol in K-WAIS and Coding in K-WAIS-IV
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Oh Seung-Min
Choi Sung-Won
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Abstract
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Background: The present study examined whether any unconsidered variable during revision of the K-WAIS would make standardized score of the test unreliable.
Methods: In this study, a group of participants were assigned to perform modified ‘coding’ tests, respectively. To avoid the norm group issue, all the conditions except the stimuli were set as identical among the tests. Analysis focused which variable would affect difference among the tests, including their distribution patterns.
Results: The results showed that physical differences of spatial organization across the tests and background such as figure shapes attributed to significant difference between 'digit symbol' in K-WAIS and 'coding' in K-WAIS-Ⅳ.
Conclusions: It suggests that there exists possibility of different difficulty between 'digit symbol' in K-WAIS and 'coding' in K-WAIS-Ⅳ. Analysis of performance distribution also indicate that the test with better performance (K-WAIS coding) may have lower difficulty because its score distribution was more negatively skewed than the other.
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KEYWORD
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K-WAIS, K-WAIS-Ⅳ, coding, standardized score, skewness
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