Back to matchesWe found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleAdvances in Mental Retardation and Developmental Disabilities.AuthorsEmerson, EricPublicationBehavioural & Cognitive Psychotherapy, 1993, Vol 21, Issue 1, p68ISSN1352-4658Publication typeBook ReviewDOI10.1017/S0141347300017869