“…This literature applies emergent learning practices and verbal operants to foreign vocabulary training (Daly & Dounavi, 2020). The languages taught include Native American (Haegele et al, 2011), Japanese (Petursdottir et al, 2014), French (Daly & Dounavi, 2020;Polson et al, 1997;Polson & Parsons, 2000), German (Rocha e Silva & Ferster, 1966), Spanish (Joyce & Joyce, 1993;Matter et al, 2020;Petursdottir et al, 2008;Ramirez et al, 2009), Italian (Petursdottir & Hafliđadóttir, 2009), Chinese (Wu et al, 2019), Welsh (May et al, 2016(May et al, , 2019, and English (Cortez et al, 2020(Cortez et al, , 2021Dounavi, 2011Dounavi, , 2014Rosales et al, 2011Rosales et al, , 2012. This literature's validity.…”