Bayesian Checks on Cheating on Tests

Wim Linden () and Charles Lewis

Psychometrika, 2015, vol. 80, issue 3, 689-706

Abstract: Posterior odds of cheating on achievement tests are presented as an alternative to $$p$$ p values reported for statistical hypothesis testing for several of the probabilistic models in the literature on the detection of cheating. It is shown how to calculate their combinatorial expressions with the help of a reformulation of the simple recursive algorithm for the calculation of number-correct score distributions used throughout the testing industry. Using the odds avoids the arbitrary choice between statistical tests of answer copying that do and do not condition on the responses the test taker is suspected to have copied and allows the testing agency to account for existing circumstantial evidence of cheating through the specification of prior odds. Copyright The Psychometric Society 2015

Keywords: answer copying; Bayesian checks; cheating on tests; erasure analysis; generalized binomial distribution; statistical hypothesis testing (search for similar items in EconPapers)
Date: 2015
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Citations: View citations in EconPapers (5)

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DOI: 10.1007/s11336-014-9409-x

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