“…Parent–child interaction therapy has been examined in multiple studies, which purports that training can decrease caregivers' use of some speech functions, including questions, commands, and criticisms, while increasing praise, reflection, and commenting (Elder et al, 2011; Ginn, Clionsky, Eyberg, Warner‐Metzger, & Abner, 2017; Parladé et al, 2020; Ros & Graziano, 2019; Zlomke, Jeter, & Murphy, 2017; Scudder et al, 2019). However, only two studies [Ginn et al, 2017; Scudder et al, 2019] were RCTs, and downstream child gains were restricted to measures subject to detection bias (e.g., parent reports, which are especially problematic for caregiver mediated interventions). Another issue with this research is that caregivers' speech functions are measured using a standardized protocol and coding system developed on nonautistic children (the Dyadic Parent–Child Interaction Coding System‐IV , Eyberg, Nelson, Ginn, Bhuiyan, & Boggs, 2013), and the construct validity of this instrument is not yet clear for autistic child‐caregiver dyads [Zlomke, Bauman, & Edwards, 2019].…”