“…Few (4/27) studies specified diagnosis by reporting: the presence of Down Syndrome (Bennett & Buckley, 2013;Burgoyne et al, 2012;Lanfranchi et al, 2015) or Fragile X Syndrome (Hessl et al, 2019). Two studies identified participants with intellectual disability from educational records: an Education and Health Care Plan in place (Grindle et al, 2021), or input from an educational psychologist (Drysdale & Porter-Armstrong, 2008) (Agbaria, 2020;Bagattoni et al, 2020;Baran et al, 2013;Dessemontet et al, 2021;Drysdale & Porter-Armstrong, 2008;Hessl et al, 2019;Hong, 2012;Jacques & Townsend, 1998;Janeslätt & Granlund, 2019;Kantner & Clark, 1982;Kostulski et al, 2021;Lee et al, 2017;Lee et al, 2020;Maïano & Erraïs, 2001;McDuffie et al, 2018;Roberts-Tyler et al, 2020;Wuang & Su, 2013). Seven studies included participants with moderate-severe or severe intellectual disability (Balthazar & Sindberg, 1971;Grindle et al, 2021;Lanfranchi et al, 2015;Litrownik et al, 1978;Sepúlveda & Heinze, 2013), two of which were published from the same cohort with an average DQ of 30 (Saint-Georges et al, 2020;Tanet et al, 2020).…”