Construct confusion and measurement challenges have plagued emergent literacy research for decades. Using a 2 × 2 × 2 factorial design, this study evaluated the dimensionality of alphabet knowledge and identified the sequence of development of 8 alphabet knowledge skills. Eleven models were evaluated in a sample of 3,692 preschool- and elementary…

In this study logistic regression and Lord's Chi Square methods were used to research the items that have DIF. The study utilized Peabody Picture Vocabulary Test (PPVT). The original form of the PPVT includes four options. Three different forms (A, B and C) were formed by removing one of the distractors respectively. The original form of PPVT was…

Research Findings Research suggests children from low-income environments have vocabularies that differ from those of their higher-income peers. They may have basic knowledge of many words of which children from higher income environments have acquired sub- or supra-ordinate knowledge. This study sought to determine if children from low-income…

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…

This study investigated the use of latent class analysis for the detection of differences in item functioning on the Peabody Picture Vocabulary Test-Third Edition (PPVT-III). A two-class solution for a latent class model appeared to be defined in part by ability because Class 1 was lower in ability than Class 2 on both the PPVT-III and the…

Administered Peabody Picture Vocabulary Test-Revised (PPVT-R) to 112 elementary school students in computer-automated and standard formats to investigate comparability of test results. Correlations found between standard and modified versions were positive, substantial, and acceptable for clinical use. Considers usefulness of adapted psychological…

The purpose of this study was to determine whether a Mexican version of the Peabody Picture Vocabulary Test could be improved by directly translating both forms of the American test, then using decision procedures to select the better item of each pair. The reliability of the simple translations suffered. (Author/BW)

Two cause indicator models were formulated to link items of the Home Observation for Measurement of the Environment--Short Form to the Peabody Picture Vocabulary Test--Revised. These models were tested with data from the National Longitudinal Survey of Youth (506 and 345 children), and a final model was developed. (SLD)

This article describes the Peabody Picture Vocabulary Test-Third Edition, an assessment designed to test preschool children in vocabulary acquisition, screen both for giftedness and mental retardation, and measure English language proficiency in individuals for whom English is not a primary language. Its administration, standardization,…