| Linking outcomes from peabody picture vocabulary test forms using item response models. | |
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MedLine Citation:
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PMID: 22232405 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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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. |
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Authors:
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Lesa Hoffman; Jonathan Templin; Mabel L Rice |
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Publication Detail:
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Type: Journal Article; Research Support, N.I.H., Extramural Date: 2012-01-09 |
Journal Detail:
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Title: Journal of speech, language, and hearing research : JSLHR Volume: 55 ISSN: 1558-9102 ISO Abbreviation: J. Speech Lang. Hear. Res. Publication Date: 2012 Jun |
Date Detail:
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Created Date: 2012-06-07 Completed Date: 2012-10-16 Revised Date: 2013-05-14 |
Medline Journal Info:
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Nlm Unique ID: 9705610 Medline TA: J Speech Lang Hear Res Country: United States |
Other Details:
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Languages: eng Pagination: 754-63 Citation Subset: IM |
Affiliation:
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Correspondence to Lesa Hoffman: lhoffman2@unl.edu. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Child Child, Preschool Ethnic Groups / statistics & numerical data Female Humans Language Development* Language Tests / standards*, statistics & numerical data* Logistic Models Longitudinal Studies Male Middle Aged Psychometrics / methods*, standards Reproducibility of Results Vocabulary* |
| Grant Support | |
ID/Acronym/Agency:
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P30 DC005803/DC/NIDCD NIH HHS; P30 HD002528/HD/NICHD NIH HHS; P30DC005803/DC/NIDCD NIH HHS; P30HD002528/HD/NICHD NIH HHS; R01 DC001803/DC/NIDCD NIH HHS; R01 DC005226/DC/NIDCD NIH HHS; R01DC001803/DC/NIDCD NIH HHS; R01DC005226/DC/NIDCD NIH HHS |
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