Detection of Answer Copying Based on the Structure of a High-Stakes Test

Detection of Answer Copying Based on the Structure of a High-Stakes Test

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 co...

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Veröffentlicht in:Applied psychological measurement 2011-10, Vol.35 (7), p.495-517
1. Verfasser: Belov, Dmitry I.
Format: Artikel
Sprache:eng
Schlagworte:
Cheating
College Admission
College Students
Comparative Analysis
Computation
Evaluation Methods
High Stakes Tests
Identification
Item Response Theory
Monte Carlo Methods
Multiple Choice Tests
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Zusammenfassung: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 K-Index demonstrates that with the VM-Index, there is a large decrease in the Type II error rate and a smaller decrease in the Type I error rate.
ISSN:0146-6216
1552-3497
DOI:10.1177/0146621611420705