@article {761, title = {Can examinees use judgments of item difficulty to improve proficiency estimates on computerized adaptive vocabulary tests? }, journal = {Journal of Educational Measurement}, volume = {39}, year = {2002}, pages = { 311-330}, author = {Vispoel, W. P. and Clough, S. J. and Bleiler, T. and Hendrickson, A. B. and Ihrig, D.} }