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ERIC Number: EJ809025
Record Type: Journal
Publication Date: 2008
Pages: 16
Abstractor: As Provided
ISSN: ISSN-0146-6216
Severity of Organized Item Theft in Computerized Adaptive Testing: A Simulation Study
Yi, Qing; Zhang, Jinming; Chang, Hua-Hua
Applied Psychological Measurement, v32 n7 p543-558 2008
Criteria had been proposed for assessing the severity of possible test security violations for computerized tests with high-stakes outcomes. However, these criteria resulted from theoretical derivations that assumed uniformly randomized item selection. This study investigated potential damage caused by organized item theft in computerized adaptive testing (CAT) for two realistic item selection methods, maximum item information and a-stratified with content blocking, using the randomized method as a baseline for comparison. Damage caused by organized item theft was evaluated by the number of compromised items each examinee could encounter and the impact of the compromised items on examinees' ability estimates. Severity of test security violation was assessed under self-organized and organized item theft simulation scenarios. Results indicated that though item theft could cause severe damage to CAT with either item selection method, the maximum item information method was more vulnerable to the organized item theft simulation than was the a-stratified method. (Contains 2 figures and 8 tables.)
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Publication Type: Journal Articles; Reports - Evaluative
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Identifiers - Location: Canada; United States