Overexposure And Underexposure Of Items In Computerized Adaptive Testing

This gain is realized by offering each candidate the most informative item from an available item bank on the basis of the results of items that have already been administered:-The item selection methods that are used to compose an _optinmm test for each individual do, however, have a number of drawbacks. Though a CAT generally presents each candidate with a different test, it often occurs that some items from the item bank are administered very frequently while others are never or hardly ever used. These two problems, i.e., overexposure and underexposure of items, can be eliminated by adding further restrictions to the item selection methods. However, this exposure control will affect the efficiency of the CAT. This paper presents a solution for both problems. The functioning of these methods will be illustrated with the results of simulation research that has been carried out to develop adaptive tests.