NotesFAQContact Us
Search Tips
Peer reviewed Peer reviewed
PDF on ERIC Download full text
ERIC Number: EJ896131
Record Type: Journal
Publication Date: 2010
Pages: 21
Abstractor: As Provided
Reference Count: 30
ISSN: ISSN-0211-2159
A Multiple Objective Test Assembly Approach for Exposure Control Problems in Computerized Adaptive Testing
Veldkamp, Bernard P.; Verschoor, Angela J.; Eggen, Theo J. H. M.
Psicologica: International Journal of Methodology and Experimental Psychology, v31 n2 p335-355 2010
Overexposure and underexposure of items in the bank are serious problems in operational computerized adaptive testing (CAT) systems. These exposure problems might result in item compromise, or point at a waste of investments. The exposure control problem can be viewed as a test assembly problem with multiple objectives. Information in the test has to be maximized, item compromise has to be minimized, and pool usage has to be optimized. In this paper, a multiple objectives method is developed to deal with both types of exposure problems. In this method, exposure control parameters based on observed exposure rates are implemented as weights for the information in the item selection procedure. The method does not need time consuming simulation studies, and it can be implemented conditional on ability level. The method is compared with Sympson Hetter method for exposure control, with the Progressive method and with alpha-stratified testing. The results show that the method is successful in dealing with both kinds of exposure problems. (Contains 3 figures and 3 tables.)
University of Valencia. Dept. Metodologia, Facultad de Psicologia, Avda. Blasco Ibanez 21, 46010 Valencia, Spain. Tel: +34-96-386-4100; Web site:
Publication Type: Journal Articles; Reports - Evaluative
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Identifiers - Location: Netherlands