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ERIC Number: EJ1111396
Record Type: Journal
Publication Date: 2006-Jun
Pages: 13
Abstractor: As Provided
ISBN: N/A
ISSN: EISSN-2330-8516
EISSN: N/A
An Elementary Test of the Normal 2PL Model against the Normal 3PL Alternative. Research Report. ETS RR-06-14
Haberman, Shelby J.
ETS Research Report Series, Jun 2006
A simple score test of the normal two-parameter logistic (2PL) model is presented that examines the potential attraction of the normal three-parameter logistic (3PL) model for use with a particular item. Application is made to data from a test from the Praxis™ series. Results from this example raise the question whether the normal 3PL model should be used routinely in preference to the normal 2PL model unless evidence exists that a substantial gain in description of data is achieved.
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Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Identifiers - Assessments and Surveys: Praxis Series
Grant or Contract Numbers: N/A