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Sinharay, Sandip; Haberman, Shelby; Boughton, Keith – Educational Measurement: Issues and Practice, 2015
Feinberg and Wainer (2014) provided a simple equation to approximate/predict a subscore's value. The purpose of this note is to point out that their equation is often inaccurate in that it does not always predict a subscore's value correctly. Therefore, the utility of their simple equation is not clear.
Descriptors: Equations (Mathematics), Scores, Prediction, Accuracy
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Sinharay, Sandip; Haberman, Shelby; Puhan, Gautam – Educational Measurement: Issues and Practice, 2007
There is an increasing interest in reporting subscores, both at examinee level and at aggregate levels. However, it is important to ensure reasonable subscore performance in terms of high reliability and validity to minimize incorrect instructional and remediation decisions. This article employs a statistical measure based on classical test theory…
Descriptors: Test Reliability, Test Theory, Test Validity, Statistical Analysis