Cook, K. F., Choi, S. W., Crane, P. K., Deyo, R. A., Johnson, K. L., & Amtmann, D..  (2008).  Letting the CAT out of the bag: Comparing computer adaptive tests and an 11-item short form of the Roland-Morris Disability Questionnaire. Spine, 33, 1378-83. presented at the May 20.