Much attention has been paid in recent years to the concept of the least restrictive treatment or training for developmentally disabled individuals. However, few well-defined procedures exist for determining the restrictiveness of modalities commonly used with these individuals. The authors identified ten frequently used modalities and six criteria for determining their relative restrictiveness. A total of 97 mental health professionals rated each modality according to the criteria, and a generalized rank order of the ten was obtained. Criteria were then established for applying the more restrictive modalities to individual residents' cases. The authors propose a four-part review process to ensure that the individual needs and rights of residents are respected.