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Direct linkHoffman, Lesa; Templin, Jonathan; Rice, Mabel L. – Journal of Speech, Language, and Hearing Research, 2012
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…
Descriptors: Item Response Theory, Test Format, Vocabulary, Comparative Analysis
