“…Participants in 9 of the studies also were diagnosed as having mild or moderate intellectual disabilities (Cannella-Malone et al, 2006;Goodson, Sigafoos, O'Reilly, Cannella, & Lancioni, 2007;Mechling et al, 2009;Mechling & Gustafson, 2008;Rayner, 2011;Sigafoos et al, 2005;Sigafoos et al, 2007;Van Laarhoven et al, 2010;Van Laarhoven & Van Laarhoven-Myers, 2006 Age of the participants ranged from 9 years to 41 years. Seven studies included middle school-and high school-aged students (Bereznak et al, 2012;Cannella-Malone et al, 2011;Cannella-Malone et al, 2012;Mechling et al, 2009;Mechling & Gustafson, 2008;Van Laarhoven et al, 2010;Van Laarhoven & Van Laarhoven-Myers, 2006). Four studies included adults (19-41 years) with autism (Cannella-Malone et al, 2006;Goodson et al, 2007;Sigafoos et al, 2005;Sigafoos et al, 2007).…”