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ERIC Number: ED523736
Record Type: Non-Journal
Publication Date: 2011-Jan
Pages: 55
Abstractor: As Provided
Reference Count: 24
Equating of Subscores and Weighted Averages under the NEAT Design. Research Report. ETS RR-11-01
Sinharay, Sandip; Haberman, Shelby
Educational Testing Service
Recently, the literature has seen increasing interest in subscores for their potential diagnostic values; for example, one study suggested the report of weighted averages of a subscore and the total score, whereas others showed, for various operational and simulated data sets, that weighted averages, as compared to subscores, lead to more accurate diagnostic information. To report weighted averages, the averages should be comparable across different test forms; that is, the averages should be equated. This report discusses how to equate weighted averages. Results from operational and simulated data sets demonstrate the small error found when equating weighted averages. Description of the Methodology of Haberman (2008b) is appended. (Contains 17 tables, 12 figures and 5 notes.)
Educational Testing Service. Rosedale Road Mailstop 19R, Princeton, NJ 08541-0001. Tel: 609-921-9000; Fax: 609-734-5410; Web site:
Publication Type: Numerical/Quantitative Data; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: Educational Testing Service