Journal article
Linking Outcomes From Peabody Picture Vocabulary Test Forms Using Item Response Models
Journal of speech, language, and hearing research, Vol.55(3), pp.754-763
06/01/2012
DOI: 10.1044/1092-4388(2011/10-0216)
PMCID: PMC3683551
PMID: 22232405
Abstract
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 from 2,625 cases in a longitudinal study of 697 persons for 459 unique PPVT items (175 items from Peabody Picture Vocabulary Test-Revised [PPVT-R] Form M [Dunn & Dunn, 1981], 201 items from Peabody Picture Vocabulary Test-3 [PPVT-3] Form A [Dunn & Dunn, 1997], and 83 items from PPVT-3 Form B [Dunn & Dunn, 1997]) were analyzed using a 2-parameter logistic IRT model.
Results: The test forms each covered approximately +/- 3 SDs of vocabulary ability with high reliability. Some differences between item sets in item difficulty and discrimination were found between the PPVT-3 Forms A and B.
Conclusions: Comparable estimates of vocabulary ability obtained from different test forms can be created through IRT modeling. The authors have also written a freely available SAS program that uses the obtained item parameters to provide IRT ability estimates given item responses to any of the 3 forms. This scoring resource will allow others with existing PPVT data to benefit from this work as well.
Details
- Title: Subtitle
- Linking Outcomes From Peabody Picture Vocabulary Test Forms Using Item Response Models
- Creators
- Lesa Hoffman - University of Nebraska–LincolnJonathan Templin - University of GeorgiaMabel L. Rice - University of Kansas
- Resource Type
- Journal article
- Publication Details
- Journal of speech, language, and hearing research, Vol.55(3), pp.754-763
- Publisher
- Amer Speech-Language-Hearing Assoc
- DOI
- 10.1044/1092-4388(2011/10-0216)
- PMID
- 22232405
- PMCID
- PMC3683551
- ISSN
- 1092-4388
- eISSN
- 1558-9102
- Number of pages
- 10
- Grant note
- P30DC005803; R01DC001803; R01DC005226 / National Institutes of Health; United States Department of Health & Human Services; National Institutes of Health (NIH) - USA P30HD002528 / University of Kansas Intellectual and Developmental Disabilities Research Center P30HD002528 / EUNICE KENNEDY SHRIVER NATIONAL INSTITUTE OF CHILD HEALTH & HUMAN DEVELOPMENT; United States Department of Health & Human Services; National Institutes of Health (NIH) - USA; NIH Eunice Kennedy Shriver National Institute of Child Health & Human Development (NICHD) R01DC001803 / NATIONAL INSTITUTE ON DEAFNESS AND OTHER COMMUNICATION DISORDERS; United States Department of Health & Human Services; National Institutes of Health (NIH) - USA; NIH National Institute on Deafness & Other Communication Disorders (NIDCD)
- Language
- English
- Date published
- 06/01/2012
- Academic Unit
- Psychological and Quantitative Foundations
- Record Identifier
- 9984371302802771
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