00915nas a2200145   4500008004100000245006100041210006000102300001100162490000700173520043400180653003400614100001600648700001600664856008900680       1999                        eng d00aComputerized Adaptive Testing: Overview and Introduction0 aComputerized Adaptive Testing Overview and Introduction  a187-940 v233 aUse of computerized adaptive testing (CAT) has increased substantially since it was first formulated in the 1970s. This paper provides an overview of CAT and introduces the contributions to this Special Issue. The elements of CAT discussed here include item selection procedures, estimation of the latent trait, item exposure, measurement precision, and item bank development. Some topics for future research are also presented. 10acomputerized adaptive testing1 aMeijer, R R1 aNering, M L  uhttp://www.iacat.org/content/computerized-adaptive-testing-overview-and-introduction01733nas a2200169   4500008004100000245009900041210006900140300001200209490000700221520112300228653002101351653003001372653000801402653002301410100001601433856011401449       1997                        eng d00aThe distribution of indexes of person fit within the computerized adaptive testing environment0 adistribution of indexes of person fit within the computerized ad  a115-1270 v213 aThe extent to which a trait estimate represents the underlying latent trait of interest can be estimated by using indexes of person fit. Several statistical methods for indexing person fit have been proposed to identify nonmodel-fitting response vectors. These person-fit indexes have generally been found to follow a standard normal distribution for conventionally administered tests. The present investigation found that within the context of computerized adaptive testing (CAT) these indexes tended not to follow a standard normal distribution. As the item pool became less discriminating, as the CAT termination criterion became less stringent, and as the number of items in the pool decreased, the distributions of the indexes approached a standard normal distribution. It was determined that under these conditions the indexes' distributions approached standard normal distributions because more items were being administered. However, even when over 50 items were administered in a CAT the indexes were distributed in a fashion that was different from what was expected. (PsycINFO Database Record (c) 2006 APA )10aAdaptive Testing10aComputer Assisted Testing10aFit10aPerson Environment1 aNering, M L  uhttp://www.iacat.org/content/distribution-indexes-person-fit-within-computerized-adaptive-testing-environment