“…In this review, it is observed that starting in 2012, fidelity of implementation practices is more frequently assessed. Seven studies (Chazin, Barton, Ledford, & Pokorski, 2018;Dunst et al, 2013;Lambert, Gallagher, & Abbott-Shim, 2015;Powell & Diamond, 2013;Ruble, 2013;Snyder, Hemmeter, McLean, Sandall, McLaughlin, & Algina, 2018;Wenz-Gross & Upshur, 2012) assessed fidelity of implementation practices and of intervention practices, as well as developmental improvements in children. In most of those studies, the researchers addressed the statistical relationship of two aspects of fidelity and the effects on children.…”