01994nas a2200193   4500008004100000020002200041245011400063210006900177260004100246300001200287490000700299520125600306653003401562653002501596653002601621100001401647700001901661856012001680       2004                        eng d  a0022-0655 (Print)00aEffects of practical constraints on item selection rules at the early stages of computerized adaptive testing0 aEffects of practical constraints on item selection rules at the   bBlackwell Publishing: United Kingdom  a149-1740 v413 aThe purpose of this study was to compare the effects of four item selection rules--(1) Fisher information (F), (2) Fisher information with a posterior distribution (FP), (3) Kullback-Leibler information with a posterior distribution (KP), and (4) completely randomized item selection (RN)--with respect to the precision of trait estimation and the extent of item usage at the early stages of computerized adaptive testing. The comparison of the four item selection rules was carried out under three conditions: (1) using only the item information function as the item selection criterion; (2) using both the item information function and content balancing; and (3) using the item information function, content balancing, and item exposure control. When test length was less than 10 items, FP and KP tended to outperform F at extreme trait levels in Condition 1. However, in more realistic settings, it could not be concluded that FP and KP outperformed F, especially when item exposure control was imposed. When test length was greater than 10 items, the three nonrandom item selection procedures performed similarly no matter what the condition was, while F had slightly higher item usage. (PsycINFO Database Record (c) 2007 APA, all rights reserved)10acomputerized adaptive testing10aitem selection rules10apractical constraints1 aChen, S-Y1 aAnkenmann, R D  uhttp://mail.iacat.org/content/effects-practical-constraints-item-selection-rules-early-stages-computerized-adaptive00622nas a2200121   4500008004100000245011300041210006900154260011200223100001200335700001900347700001500366856011900381       1999                        eng d00aExploring the relationship between item exposure rate and test overlap rate in computerized adaptive testing0 aExploring the relationship between item exposure rate and test o  aPaper presented at the annual meeting of the National Council on Measurement in Education, Montreal, Canada1 aChen, S1 aAnkenmann, R D1 aSpray, J A  uhttp://mail.iacat.org/content/exploring-relationship-between-item-exposure-rate-and-test-overlap-rate-computerized00575nas a2200121   4500008004100000245014700041210006900188260002700257100001400284700001900298700001500317856012100332       1999                        eng d00aExploring the relationship between item exposure rate and test overlap rate in computerized adaptive testing (ACT Research Report series 99-5)0 aExploring the relationship between item exposure rate and test o  aIowa City IA: ACT, Inc1 aChen, S-Y1 aAnkenmann, R D1 aSpray, J A  uhttp://mail.iacat.org/content/exploring-relationship-between-item-exposure-rate-and-test-overlap-rate-computerized-0