NotesFAQContact Us
Search Tips
Peer reviewed Peer reviewed
PDF on ERIC Download full text
ERIC Number: EJ1111346
Record Type: Journal
Publication Date: 2008-Oct
Pages: 28
Abstractor: As Provided
ISSN: EISSN-2330-8516
Comparisons among Designs for Equating Constructed-Response Tests. Research Report. ETS RR-08-53
Kim, Sooyeon; Walker, Michael E.; McHale, Frederick
ETS Research Report Series, Oct 2008
This study examined variations of a nonequivalent groups equating design used with constructed-response (CR) tests to determine which design was most effective in producing equivalent scores across the two tests to be equated. Using data from a large-scale exam, the study investigated the use of anchor CR item rescoring in the context of classical equating methods. Four linking designs were examined: (a) an anchor set containing common CR items, (b) an anchor set incorporating common CR items rescored, (c) an external multiple-choice (MC) anchor test, and (d) an equivalent groups design incorporating CR items rescored (no anchor test). The use of CR items without rescoring or the use of an external MC anchor resulted in much larger bias than the other two designs. The use of a rescored CR anchor and the equivalent groups design led to similar levels of equating error.
Educational Testing Service. Rosedale Road, MS19-R Princeton, NJ 08541. Tel: 609-921-9000; Fax: 609-734-5410; e-mail:; Web site:
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