Reliable and Abnormal Scaled Score Range Estimates for Common Wechsler Selected Subtest Short Forms

Abstract

Examination of the subtest scaled score range may be one useful indicator for determining whether to administer a complete Wechsler scale when a selected subtest short form has been employed for screening purposes. This article provides tables of subtest scaled score ranges that are reliable and deviant for common short forms of the WPPSI-R, WISC-III, and WAIS-R. Practitioners can use these range estimates as criteria for noteworthy scatter on Wechsler short forms. This systematic approach to short form scatter is an additional consideration for administrators who must make decisions about further intellectual assessment after screening. Validity studies in which reliable and abnormal scatter are compared for short and full administrations are desirable to clarify further the clinical usefulness of the tables provided.

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