“…Results of this study contribute to the extant literature in two ways. First, results of this study extend the Schumacher and Rapp (2011), Pastrana et al (2013), and Frewing et al (2015) studies by showing that RIRD with 20-min components produced subsequent decreases in VS whereas RIRD with 5-min components did not. As previously noted, there is substantial empirical support for immediate decreases in VS using RIRD; however, to our knowledge, no prior study has shown that RIRD alone can lead to a subsequent decrease in VS. To date, subsequent decreases in either vocal or motor stereotypy have previously only been demonstrated when researchers treated stereotypy using noncontingent reinforcement with structurally matched stimulation (Brogan, Rapp, Sennott, Cook, & Swinkels, 2018; Rapp, 2007; Rapp, Cook, McHugh, & Mann, 2017).…”