@article {665,
	title = {The effects of test difficulty manipulation in computerized adaptive testing and self-adapted testing},
	journal = {Applied Measurement in Education},
	volume = {12},
	year = {1999},
	pages = {167-184},
	author = {Ponsoda, V. and Olea, J. and Rodriguez, M. S. and Revuelta, J.}
}
