“…Thus, the range of participant numbers across studies varied from one to 218. Thirteen of the papers reported on the treatment of one or two individuals (Braithwaite & Richdale, 2000;Davis et al, 2013;Falcomata, Roane, Muething, Stephenson, & Ing, 2012;Fisher, Lindauer, Alterson, & Thompson, 1998;Foxx & Garito, 2007;Foxx & Meindl, 2007;Hittner, 1994;Kern, Carberry, & Haidara, 1997;Kuhn, Hardesty, & Sweeney, 2009;Luiselli, Blew, Keane, Thibadeau, & Holzman, 2000;Matson, LoVullo, Boisjoli, & Gonzales, 2008;Robertson, Wehby, & King, 2013;Sigafoos & Meikle, 1996), and two studies involved 100 or more people Silverman et al, 2014). The higher number of participated studies involved drug treatments (Arnold et al, 2003;Hellings et al, 2005;King & Davanzo, 1996;Marcus et al, 2009;McDougle et al, 1996;McDougle, Kem, & Posey, 2002;McDougle et al, 1998;Owen et al, 2009;Silverman et al, 2014;Troost et al, 2005), while the low number studies were largely psychologically based interventions.…”