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Burton, Richard F. – Assessment & Evaluation in Higher Education, 2001
Describes four measures of test unreliability that quantify effects of question selection and guessing, both separately and together--three chosen for immediacy and one for greater mathematical elegance. Quantifies their dependence on test length and number of answer options per question. Concludes that many multiple choice tests are unreliable…
Descriptors: Guessing (Tests), Mathematical Models, Multiple Choice Tests, Objective Tests