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ERIC Number: EJ1111288
Record Type: Journal
Publication Date: 2008-May
Pages: 34
Abstractor: As Provided
ISSN: EISSN-2330-8516
Equating of Mixed-Format Tests in Large-Scale Assessments. Research Report. ETS RR-08-26
Kim, Sooyeon; Walker, Michael E.; McHale, Frederick
ETS Research Report Series, May 2008
This study examined variations of the nonequivalent-groups equating design for mixed-format tests--tests containing both multiple-choice (MC) and constructed-response (CR) items--to determine which design was most effective in producing equivalent scores across the two tests to be equated. Four linking designs were examined: (a) an anchor with only MC items; (b) a mixed-format anchor containing both MC and CR items; (c) a mixed-format anchor incorporating CR item rescoring; and (d) a hybrid combining single-group and equivalent-groups designs, thereby avoiding the need for an anchor test. Designs using MC items alone or those using a mixed anchor without CR item rescoring resulted in much larger bias than the other two design approaches. The hybrid design yielded the smallest root mean squared error value.
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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