01587nas a2200145   4500008004100000245005200041210005200093300001200145490000700157520113200164653003401296100001601330700002301346856007201369       2003                        eng d00aComputerized adaptive testing with item cloning0 aComputerized adaptive testing with item cloning  a247-2610 v273 a(from the journal abstract) To increase the number of items available for adaptive testing and reduce the cost of item writing, the use of techniques of item cloning has been proposed. An important consequence of item cloning is possible variability between the item parameters. To deal with this variability, a multilevel item response (IRT) model is presented which allows for differences between the distributions of item parameters of families of item clones. A marginal maximum likelihood and a Bayesian procedure for estimating the hyperparameters are presented. In addition, an item-selection procedure for computerized adaptive testing with item cloning is presented which has the following two stages: First, a family of item clones is selected to be optimal at the estimate of the person parameter. Second, an item is randomly selected from the family for administration. Results from simulation studies based on an item pool from the Law School Admission Test (LSAT) illustrate the accuracy of these item pool calibration and adaptive testing procedures. (PsycINFO Database Record (c) 2003 APA, all rights reserved).10acomputerized adaptive testing1 aGlas, C A W1 avan der Linden, WJ  uhttp://iacat.org/content/computerized-adaptive-testing-item-cloning