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A CUSUM to Detect Person Misfit: A Discussion and Some Alternatives for Existing Procedures
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Tendeiro, Jorge N.; Meijer, Rob R. – Applied Psychological Measurement, 2012
This article extends the work by Armstrong and Shi on CUmulative SUM (CUSUM) person-fit methodology. The authors present new theoretical considerations concerning the use of CUSUM person-fit statistics based on likelihood ratios for the purpose of detecting cheating and random guessing by individual test takers. According to the Neyman-Pearson…
Descriptors: Cheating, Individual Testing, Adaptive Testing, Statistics
Detection of Answer Copying Based on the Structure of a High-Stakes Test
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Belov, Dmitry I. – Applied Psychological Measurement, 2011
This article presents the Variable Match Index (VM-Index), a new statistic for detecting answer copying. The power of the VM-Index relies on two-dimensional conditioning as well as the structure of the test. The asymptotic distribution of the VM-Index is analyzed by reduction to Poisson trials. A computational study comparing the VM-Index with the…
Descriptors: Cheating, Journal Articles, Computation, Comparative Analysis
Using Item Response Theory to Obtain Individual Information from Randomized Response Data: An Application Using Cheating Data
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Fox, Jean-Paul; Meijer, Rob R. – Applied Psychological Measurement, 2008
The authors discuss a new method that combines the randomized response technique with item response theory. This method allows the researcher to obtain information at the individual person level without knowing the true responses. With this new method, it is possible to compare groups of individuals by means of analysis of variance or regression…
Descriptors: Psychological Evaluation, Educational Assessment, Item Response Theory, Statistical Analysis