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Direct linkWarschausky, Seth; Van Tubbergen, Marie; Asbell, Shana; Kaufman, Jacqueline; Ayyangar, Rita; Donders, Jacobus – Assessment, 2012
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…
Descriptors: Testing, Assistive Technology, Testing Accommodations, Psychometrics
Hoffman, 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
