TY - JOUR T1 - A Comparison of Exposure Control Procedures in CAT Systems Based on Different Measurement Models for Testlets JF - Applied Measurement in Education Y1 - 2013 A1 - Boyd, Aimee M. A1 - Dodd, Barbara A1 - Fitzpatrick, Steven VL - 26 UR - http://www.tandfonline.com/doi/abs/10.1080/08957347.2013.765434 ER -