“…Research is mainly focused on prevalence (e.g. Bowen 2015), the impact of EDV on children's behaviours (Holmes, Voith, and Gromoske 2015) and school results (Assad, Friedemann-Sanchez, and Levison 2016), and the psychological and social effects of EDV (Graham-Berman et al 2012;Holt, Buckley, and Whelan 2008).However, relatively few studies consider the effects on children's educational outcomes (King and Scott 2014;Olofsson et al 2011).…”