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ERIC Number: EJ1109285
Record Type: Journal
Publication Date: 2015-Dec
Pages: 9
Abstractor: As Provided
ISSN: EISSN-2330-8516
Estimating Conditional Distributions of Scores on an Alternate Form of a Test. Research Report. ETS RR-15-18
Livingston, Samuel A.; Chen, Haiwen H.
ETS Research Report Series, Dec 2015
Quantitative information about test score reliability can be presented in terms of the distribution of equated scores on an alternate form of the test for test takers with a given score on the form taken. In this paper, we describe a procedure for estimating that distribution, for any specified score on the test form taken, by estimating the joint distribution of equated scores on two forms of the test. The procedure requires as input the score distribution and the reliability coefficient, estimated for the test-taker population. In tryouts, the procedure performed well for score distributions like those commonly encountered in large-scale testing situations.
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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