“…The performance of tasks has traditionally been conceived as an individual form of engagement. Some attention has also been devoted to the possibility of enabling persons with multiple disabilities to work together with their peers to achieve forms of parallel engagement and physical contact (see Lancioni & Mantini, 1998;Lancioni, Oliva, Andreoni, & Pirani, 1995). This development stems from the realization that these persons live in a condition of isolation that can reduce their sensory input and social opportunities and may prefer to work together with peers and, in any case, should have the opportunity to express their preferences.The aim of the study reported here was twofold: (1) to teach four persons with multiple disabilities cooperative engagement (in addition to individual engagement) in useful occupational-vocational tasks and (2) to assess the persons' performance in and preference between the two engagement situations.…”