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...
Saved in:
Published in | Applied psychological measurement Vol. 35; no. 7; pp. 495 - 517 |
---|---|
Main Author | |
Format | Journal Article |
Language | English |
Published |
Los Angeles, CA
SAGE Publications
01.10.2011
|
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | 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. |
---|---|
Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
ISSN: | 0146-6216 1552-3497 |
DOI: | 10.1177/0146621611420705 |