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ERIC Number: EJ1111369
Record Type: Journal
Publication Date: 2008-Oct
Pages: 45
Abstractor: As Provided
ISSN: EISSN-2330-8516
Comparison of Subscores Based on Classical Test Theory Methods. Research Report. ETS RR-08-54
Puhan, Gautam; Sinharay, Sandip; Haberman, Shelby; Larkin, Kevin
ETS Research Report Series, Oct 2008
Will reporting subscores provide any additional information than the total score? Is there a method that can be used to provide more trustworthy subscores than observed subscores? These 2 questions are addressed in this study. To answer the 2nd question, 2 subscore estimation methods (i.e., subscore estimated from the observed total score or subscore estimated using both the observed subscore and observed total score) are compared. Analyses conducted on 8 certification tests indicated that reporting subscores at the examinee level may not be necessary as they do not provide much additional information than the total score. However, at the institutional level (for institution size greater than 30), reporting subscores may not be harmful, although it may be redundant. Finally, results indicated that subscores estimated using both the observed subscore and observed total score were the most trustworthy and may be used if subscores were to be reported.
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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