“…Thus, the risk of publication bias in genuine SSED studies of ABA remains unknown. The need to evaluate this risk has heightened in recent years, because investigators have increasingly sought to identify evidencebased practices by synthesizing data from SSED studies, particularly for individuals with an autism spectrum disorder (ASD; e.g., National Autism Center [NAC], 2009;Odom, Hume, Boyd, & Stabel, 2012;Reichow, Doehring, Cicchetti, & Volkmar, 2011). Evaluation of publication bias is widely regarded as essential in systematic reviews of group studies (Moher, Liberati, Tetzlaff, & Altman, 2009) yet is rarely performed or even mentioned in reviews of SSED studies, indicating that SSED investigators are unaware of or unconcerned about such bias.…”