ABSTRACT
Persons with profound and multiple disabilities, regardless of whether their disabilities are congenital or acquired, are often unable to interact with their immediate environment and control relevant stimuli because of their limited response skills (Lancioni et al. 2001a, 2001b, 2007b, 2007c; Mechling 2006). This lack of interaction (of response skills) has far-reaching social and practical implications. In fact, it emphasizes a condition of withdrawal and weakness, reduces the persons’ opportunities of an active, constructive role within the environment, limits their overall perspectives of development or recovery, impoverishes their social appearance, and negatively affects their quality of life (Lancioni et al. 2001c, 2001d, 2008a, 2008b; Schalock et al. 2003; Lachapelle et al. 2005; Petry et al. 2009; McDougall et al. 2010).
