INTERNAL CONSISTENCY RELIABILITY OF THE WISC-IV AMONG PRIMARY SCHOOL STUDENTS1

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Abstract

Internal consistency reliabilities of the WISC-IV subtest and index scores were estimated for a sample of 76 primary school students from a small Midwestern community. Means for age and Full Scale IQ were 8.2 yr. (SD = 2.3) and 110.5 (SD = 11.7), respectively. Internal consistency reliabilities were compared with those for the WISC-IV standardization sample of 200. The range of reliabilities for the subtests was from .76 for Picture Concepts to .94 for Arithmetic and from .92 for Perceptual Reasoning Index to .96 for Verbal Comprehension Index and Full Scale IQ. The Full Scale IQ internal consistency reliability is comparable to that of the standardization sample. However, in all but one instance the reliabilities were greater than those of the normative sample.

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