“…Moreover, the original MSWO procedures consisted of five sessions (DeLeon & Iwata, 1996), whereas some more recent studies have used MSWOs consisting of only three sessions (e.g., Kronfli et al, 2020;Slanzi et al, 2019). Previous research has indicated that three-session MSWOs effectively identify highly preferred stimuli that are reinforcing (Carr et al, 2000;Higbee et al, 2000;Tullis et al, 2012), produce hierarchies that are strongly correlated with five-session MSWO hierarchies (Richman et al, 2016), and often identify the same highest-preferred stimuli (Graff & Ciccone, 2002;Tullis et al, 2012) as a five-session MSWO. Thus, three-session MSWOs generally produce the same outcomes as a five-session assessment in a more efficient manner.…”