“…These studies have included different populations such as children with a history of school failure (e.g., de Rose et al, 1989de Rose et al, , 1996de Souza et al, 2009;Hanna et al, 2004), preschool children and children with a low socioeconomic status (e.g., de Rose et al, 1989;Matos et al, 2006;Reis et al, 2013), graduate students using pseudowords (e.g., Hanna et al, 2011), and children with intellectual disabilities (e.g., Gomes et al, 2017). Although much success has been reported with regard to the establishment of emergent relations using the MTS procedure, some individuals may exhibit faulty stimulus control in the MTS procedure, such as position bias (e.g., Bourret et al, 2012;Da Hora et al, 2018;Galloway, 1967;Kangas & Branch, 2008). Furthermore, as suggested by Lantaya et al (2018), some individuals may not have the prerequisite skills to emit differential responses to sample and comparison stimuli in the MTS procedure.…”