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Peer reviewedLivingston, Samuel A.; Lewis, Charles – Journal of Educational Measurement, 1995
A method is presented for estimating the accuracy and consistency of classifications based on test scores. The reliability of the score is used to estimate effective test length in terms of discrete items. The true-score distribution is estimated by fitting a four-parameter beta model. (SLD)
Descriptors: Classification, Estimation (Mathematics), Scores, Statistical Distributions
Download full textJunker, Brian W. – 1992
A simple scheme is proposed for smoothly approximating the ability distribution for relatively long tests, assuming that the item characteristic curves (ICCs) are known or well estimated. The scheme works for a general class of ICCs and is guaranteed to completely recover the theta distribution as the test length increases. The proposed method of…
Descriptors: Computer Simulation, Equations (Mathematics), Estimation (Mathematics), Item Bias
Hambleton, Ronald K. – 1995
Performance assessments in education and credentialing are becoming popular. At the same time, there do not exist any well established and validated methods for setting standards on performance assessments. This paper describes several of the new standard-setting methods that are emerging for use with performance assessments and considers their…
Descriptors: Achievement Tests, Cutting Scores, Holistic Evaluation, Licensing Examinations (Professions)
