“…Thirteen RCTs included children aged 19–36 months, nine of which used combined multicomponent approaches (Dawson et al., ; Drew et al., ; Kasari, Gulsrud, Paparella, Hellemann, & Berry, ; Kasari, Gulsrud, Wong, Kwon, & Locke, ; Landa, Holman, O'Neill, & Stuart, ; Rogers et al., ; Shire et al., ; Welterin, Turner‐Brown, Harris, Mesibov, & Delmolino, ; Wetherby et al., ), three of which used developmental approaches (Carter et al., ; Kasari, Siller et al., ; Schertz, Odom, Baggett, & Sideris, ), and one of which used a behavioural approach (Wong & Kwan, ).…”