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ERIC Number: EJ929241
Record Type: Journal
Publication Date: 2011-Jul
Pages: 18
Abstractor: As Provided
Reference Count: 28
ISBN: N/A
ISSN: ISSN-0146-6216
Two Approaches for Using Multiple Anchors in NEAT Equating: A Description and Demonstration
Moses, Tim; Deng, Weiling; Zhang, Yu-Li
Applied Psychological Measurement, v35 n5 p362-379 Jul 2011
Nonequivalent groups with anchor test (NEAT) equating functions that use a single anchor can have accuracy problems when the groups are extremely different and/or when the anchor weakly correlates with the tests being equated. Proposals have been made to address these issues by incorporating more than one anchor into NEAT equating functions. These proposals have not been extensively considered or comparatively evaluated. This study evaluates two proposed approaches for incorporating more than one anchor into NEAT equating functions, poststratification and missing data imputation. The approaches are studied and compared in an example of equating mixed format tests where the use of multiple equating is expected to improve equating. The results show that both approaches produced nearly equivalent equating results but that the poststratification approach has some flexibility and accuracy advantages over imputation in terms of standard errors. (Contains 4 tables, 4 figures and 2 notes.)
SAGE Publications. 2455 Teller Road, Thousand Oaks, CA 91320. Tel: 800-818-7243; Tel: 805-499-9774; Fax: 800-583-2665; e-mail: journals@sagepub.com; Web site: http://sagepub.com
Publication Type: Journal Articles; Reports - Evaluative
Education Level: High Schools
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A