Reliability and abnormality of scaled-score ranges.
The distinction between the reliability (statistical significance) and the abnormality (unusualness) of test score differences is shown to apply equally to a common index of subtest scatter, the scaled-score range. The evaluation of scaled-score ranges on the WISC-R is used as an illustrative example.
Silverstein
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Mental Retardation Research Center, Lanterman Developmental Center Research Group, School of Medicine, University of California, Los Angeles 91769.
D002648:Child; D006801:Humans; D007360:Intelligence; D019965:Neurocognitive Disorders / Q000175:diagnosis*; D011594:Psychometrics; D012016:Reference Values; D014888:Wechsler Scales