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Download full textSinharay, Sandip – Educational Testing Service, 2010
Recently, there has been an increasing level of interest in subscores for their potential diagnostic value. Haberman (2008) suggested a method based on classical test theory to determine whether subscores have added value over total scores. This paper provides a literature review and reports when subscores were found to have added value for…
Descriptors: Scores, Correlation, Reliability, Item Response Theory
Kane, Michael – Educational Testing Service, 2010
The 12th annual William H. Angoff Memorial Lecture was presented by Dr. Michael T. Kane, ETS's (Educational Testing Service) Samuel J. Messick Chair in Test Validity and the former Director of Research at the National Conference of Bar Examiners. Dr. Kane argues that it is important for policymakers to recognize the impact of errors of measurement…
Descriptors: Error of Measurement, Scores, Public Policy, Test Theory
