Interrater reliability of the written expression subtest of the Peabody Individual Achievement Test-Revised: an adolescent and adult sample.

Abstract

This study examined the interrater reliability of the measure of written expression in the Peabody Individual Achievement Test-Revised. A sample more diverse in years of education and age than the normed population was used in this study. Fifty subjects from California, comprised of 72% females and 74% Caucasians, and ranging in age from 13 to 46, comprised the sample. Subjects were administered the "box" prompt from the PIAT-R Written Expression subtest (Level II). Interrater reliability for these scores was within the same range as the values provided in the manual once restriction of range was corrected.