In science in general and in the context of single-case experimental designs, replication of the effects of the intervention within and/or across participants or experiments is crucial for establishing causality and for assessing the generality of the intervention effect. Specific developments and proposals for assessing whether an effect has been…

A model of ongoing consultation was effectively implemented in a community group home for eight adults with severe and profound mental retardation. Two consultants taught staff members to use a token reinforcement system, engage clients in a variety of activities, and improve staff interactions with clients. (Author/DB)