“…Of the 16 studies in this category, 15 studies had participants with mild to moderate IDD and only one study had participants with moderate to severe IDD. Types of intervention included: (a) VM, VM + photos, VM + VP, and VP (Allen et al, 2015;Cannella-Malone et al, 2006;Edrisinha, O'Reilly, Choi, Sigafoos & Lancioni, 2011;Horn et al, 2008;Mechling, Gast & Fields, 2008;Mechling & Gustafson, 2009;Mechling & O'Brien, 2010;Mechling & Seid, 2011;Taber-Doughty, Miller, Shurr, & Wiles, 2013;Taber-Doughty et al, 2011;Van Laarhoven & Van Laarhoven-Myers, 2006); (b) augmented feedback implemented on a computer screen (Applegate et al, 2008); (c) progressive time delay (PTD) for self-instruction using videos on an iPad (Smith et al, 2016) or using a DVD on an iPad (Hammond, Whatley, Ayres & Gast, 2010); (d) auditory cues (Alberto, Sharpton, Briggs & Stright, 1986;Taber-Doughty, 2005) with or without visual cues (Bouck et al, 2012); (e) video recording and still photographs (Mechling, Gast & Seid, 2010); and (f) GPS based software with embedded pictures (Davies et al, 2010). Studies reported gains in acquiring skills with or without support for generalisation.…”