@article {69,
	title = {Effects of practical constraints on item selection rules at the early stages of computerized adaptive testing},
	journal = {Journal of Educational Measurement},
	volume = {41},
	number = {2},
	year = {2004},
	pages = {149-174},
	publisher = {Blackwell Publishing: United Kingdom},
	abstract = {The 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)},
	keywords = {computerized adaptive testing, item selection rules, practical constraints},
	isbn = {0022-0655 (Print)},
	author = {Chen, S-Y. and Ankenmann, R. D.}
}
@booklet {1349,
	title = {Exploring the relationship between item exposure rate and test overlap rate in computerized adaptive testing (ACT Research Report series 99-5)},
	year = {1999},
	note = {(also National Council on Measurement in Education paper, 1999).},
	address = {Iowa City IA: ACT, Inc},
	author = {Chen, S-Y. and Ankenmann, R. D. and Spray, J. A.}
}
