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ERIC Number: ED507084
Record Type: Non-Journal
Publication Date: 2009-Feb
Pages: 22
Abstractor: As Provided
Reference Count: 19
ISBN: N/A
ISSN: N/A
An Alternative IRT Observed Score Equating Method. CRESST Report 751
Kang, Taehoon; Chen, Troy T.
National Center for Research on Evaluation, Standards, and Student Testing (CRESST)
In this report, an alternative item response theory (IRT) observed score equating method was newly developed. The proposed equating method was illustrated with two real data sets and the equating results were compared to those of traditional IRT true score and IRT observed score equating methods. Using three loss indices, the new method appeared to produce equating equivalents more similar to those of the IRT observed score equating than those of the IRT true score equating. In addition to the conversion relationships between new form scores and their equating equivalents on the old form scale, the bootstrap standard errors of equating were provided and compared for the three IRT equating methods. These methods performed similarly. (Contains 5 figures and 3 tables.)
National Center for Research on Evaluation, Standards, and Student Testing (CRESST). 300 Charles E Young Drive N, GSE&IS Building 3rd Floor, Mailbox 951522, Los Angeles, CA 90095-1522. Tel: 310-206-1532; Fax: 310-825-3883; Web site: http://www.cresst.org
Publication Type: Reports - Evaluative
Education Level: N/A
Audience: N/A
Language: English
Sponsor: Institute of Education Sciences (ED)
Authoring Institution: National Center for Research on Evaluation, Standards, and Student Testing