Hye K. Pae|Daphne Greenberg|Robin D. Morris
Construct Validity and Measurement Invariance of the Peabody Picture Vocabulary Test–III Form A
University of Cincinnati|Georgia State University|Georgia State University
aim study apply rasch model analysis psychometric properties peabody picture vocabulary testiii form ppvtiiia items struggling adult readers ppvtiiia administered 229 african american adults whose isolated word reading skills third fifth grades conformity adults performance ppvtiiia items evaluated using winsteps software analysis ppvtiiia items combined fully support use useful measure receptive vocabulary struggling adult readers african americans achieve adequate model fit items 73 156 analyzed items analyzed showed adequate internal consistency reliability unidimensionality freedom differential item functioning ability gender age minor modification appropriate treatment misfit items results supported measurement properties internal consistency reliability unidimensionality ppvtiiia items measurement invariance test across subgroups ability age gender