This study examined the psychometric properties of test presentation and response formats that were modified to be accessible with the use of assistive technology (AT). First, the stability of psychometric properties was examined in 60 children, ages 6 to 12, with no significant physical or communicative impairments. Population-specific…

Purpose: The present work describes how vocabulary ability as assessed by 3 different forms of the Peabody Picture Vocabulary Test (PPVT; Dunn & Dunn, 1997) can be placed on a common latent metric through item response theory (IRT) modeling, by which valid comparisons of ability between samples or over time can then be made. Method: Responses…

Reviews Peabody Individual Achievement Test-Revised (PIAT-R), a revision of the 1970 PIAT. Describes administration and scoring criteria, psychometric properties, and new features of test design. Emphasizes implications for the practitioner. Concludes that PIAT-R may be useful screening tool when general information concerning student achievement…

This article describes the Peabody Individual Achievement Test-Revised-Normative Update, an individually administered school achievement measure for students from kindergarten through grade twelve. The test assesses students' knowledge of general information, reading recognition, reading comprehension, mathematics, spelling, and written…