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ERIC Number: EJ982115
Record Type: Journal
Publication Date: 2012-Aug
Pages: 21
Abstractor: As Provided
ISBN: N/A
ISSN: ISSN-0013-1644
EISSN: N/A
Nominal Weights Mean Equating: A Method for Very Small Samples
Babcock, Ben; Albano, Anthony; Raymond, Mark
Educational and Psychological Measurement, v72 n4 p608-628 Aug 2012
The authors introduced nominal weights mean equating, a simplified version of Tucker equating, as an alternative for dealing with very small samples. The authors then conducted three simulation studies to compare nominal weights mean equating to six other equating methods under the nonequivalent groups anchor test design with sample sizes of 20, 50, and 80 examinees. Results showed that nominal weights mean equating was generally the most effective. Nominal weights mean equating was, furthermore, never among the least effective methods in any condition, indicating its utility across a wide variety of contexts. Circle-arc equating, another recently developed method, also showed a great deal of promise. The identity function (i.e., no equating) was adequate only when test forms were nearly equivalent in difficulty. (Contains 4 tables.)
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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
Grant or Contract Numbers: N/A