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Reliability of score differences on wechsler's intelligence scales
Author(s) -
Silverstein A. B.
Publication year - 1991
Publication title -
journal of clinical psychology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.124
H-Index - 119
eISSN - 1097-4679
pISSN - 0021-9762
DOI - 10.1002/1097-4679(199103)47:2<264::aid-jclp2270470212>3.0.co;2-0
Subject(s) - psychology , wechsler adult intelligence scale , wechsler preschool and primary scale of intelligence , wechsler intelligence scale for children , reliability (semiconductor) , psychometrics , intelligence quotient , developmental psychology , test score , raw score , statistics , clinical psychology , cognition , psychiatry , standardized test , mathematics , power (physics) , physics , quantum mechanics , mathematics education , raw data
Comparisons are made between the results given by two formulae for the reliability of the difference between an individual subtest score and the average subtest score on a scale to which that subtest belongs. For the WAIS‐R and the WISC‐R, the correct reliabilities reported here are appreciably higher than the incorrect reliabilities reported previously, and the apparent reversal of this result for the WPPSI is explained as an artifact. Even the correct reliabilities are very low, however, more than three‐quarters of them below 0.70.