Document Detail


Linking outcomes from peabody picture vocabulary test forms using item response models.
MedLine Citation:
PMID:  22232405     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
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.
Authors:
Lesa Hoffman; Jonathan Templin; Mabel L Rice
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural     Date:  2012-01-09
Journal Detail:
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:
Created Date:  2012-06-07     Completed Date:  2012-10-16     Revised Date:  2013-06-26    
Medline Journal Info:
Nlm Unique ID:  9705610     Medline TA:  J Speech Lang Hear Res     Country:  United States    
Other Details:
Languages:  eng     Pagination:  754-63     Citation Subset:  IM    
Affiliation:
Correspondence to Lesa Hoffman: lhoffman2@unl.edu.
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MeSH Terms
Descriptor/Qualifier:
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:
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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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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