AbstractState implementation plans required by PL 94–142 were collected and reviewed to determine whether psychologists were mentioned as appropriate members of multidisciplinary evaluation teams. Questionnaire data from 625 directors of special education also were analyzed to determine the frequency with which psychologists actually participated on the evaluation teams. The review revealed an apparent reluctance on the part of states to specify psychologists as appropriate team members. When psychologists were mentioned, school psychologists and other types of psychologists were identified with near equal frequencies. Even though states' implementation guidelines infrequently identified psychologists for participation on multidisciplinary teams, 81% of the surveyed teams actually included a psychologist. However, psychologists' rate of participation varied among the states. Implications of the minimum state requirements and varying participation of psychologists among states are discusse