“…Table 3 details the AAC interventions with high-technology computer-aided AAC strategies (Happ et al, 2004b;Happ et al, 2005; Rodriguez et al, 2016), ease or difficulties in communication (Happ et al, 2004b;Happ et al, 2005;Happ et al, 2014;Maringelli et al, 2013;Otuzoglu & Karahan, 2014;Rodriguez & Rowe, 2010, Rodriguez et al, 2016, communication success or effectiveness (Happ et al, 2014;Happ et al, 2016), initiation of communication (Happ et al, 2005), staff satisfaction (Maringelli et al, 2013;Miglietta et al, 2004), patient agitation and anxiety (Happ et al, 2016) and barriers to use (Happ et al, 2004b;Happ et al, 2014;Rodriguez et al, 2010;Rodriguez & Rowe, 2012). A variety of study designs were used which included some described as randomised controlled trials (RCT) (El-Soussi et al, 2014), randomised cluster trials (Happ et al, 2015), quasi-experimental (Happ et al, 2014;Otuzoglu & Karahan, 2014, Rodriguez et al, 2016, correlational (Nilsen et al, 2014), time-series (Rodriguez & Rowe, 2010) to pilot/feasibility studies (Happ et al, 2004b;Happ et al, 2005;Maringelli et al, 2013;Miglietta et al, 2004;Rodriguez et al, 2012). The studies described as randomised trials (El-Soussi et al, 2014;Happ et al, 2016) were treated as controlled or cohort analytic trials as the reported randomisation process was unclear.…”