This document, as a supplement to the final report of the Orthopaedic Training Study, presents a discussion of the rationale behind the implementation of a laboratory course in psychomotor skills development for medical students. Medical educators examined resident training in terms of 3 components of cognitive elements of learning: cognitive, affective, and psychomotor. It was determined that development of the psychomotor aspects of orthopaedic surgery in any sequenced or ordered fashion is largely ignored. Thus, the document studies and outlines a possible laboratory course in psychomotor skills in orthopaedic surgery, a psychomotor skills plaster laboratory, and an orthopaedic traction skills laboratory. See also HE 003 277 and HE 003 276. (HS)