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ERIC Number: EJ788912
Record Type: Journal
Publication Date: 2008
Pages: 17
Abstractor: Author
Reference Count: 37
ISSN: ISSN-0013-1644
Latent Class Analysis of Differential Item Functioning on the Peabody Picture Vocabulary Test-III
Webb, Mi-young Lee; Cohen, Allan S.; Schwanenflugel, Paula J.
Educational and Psychological Measurement, v68 n2 p335-351 2008
This study investigated the use of latent class analysis for the detection of differences in item functioning on the Peabody Picture Vocabulary Test-Third Edition (PPVT-III). A two-class solution for a latent class model appeared to be defined in part by ability because Class 1 was lower in ability than Class 2 on both the PPVT-III and the Expressive Vocabulary Test (EVT). This difference was much larger on the PPVT-III for the low-ability class. No difference was found for the high-ability latent class, suggesting that the difference was a result of something in the PPVT-III that was not present in the EVT. The difference on the PPVT-III for low-ability children appeared to be a result of the structure of the items on the test, which seems to encourage the overriding use of the novel name--nameless category strategy for the selection of an answer--a strategy not available on the EVT. (Contains 2 figures and 3 tables.)
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Publication Type: Journal Articles; Reports - Evaluative
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Identifiers - Assessments and Surveys: Peabody Picture Vocabulary Test