ERIC Number: EJ940994
Record Type: Journal
Publication Date: 2011
Abstractor: As Provided
An NCME Instructional Module on Subscores
Sinharay, Sandip; Puhan, Gautam; Haberman, Shelby J.
Educational Measurement: Issues and Practice, v30 n3 p29-40 Fall 2011
The purpose of this ITEMS module is to provide an introduction to subscores. First, examples of subscores from an operational test are provided. Then, a review of methods that can be used to examine if subscores have adequate psychometric quality is provided. It is demonstrated, using results from operational and simulated data, that subscores have to be based on a sufficient number of items and have to be sufficiently distinct from each other to have adequate psychometric quality. It is also demonstrated that several operationally reported subscores do not have adequate psychometric quality. Recommendations are made for those interested in reporting subscores for educational tests.
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Publication Type: Journal Articles; Reports - Descriptive
Education Level: N/A
Authoring Institution: N/A