“…Therefore, they can also be trained by manipulating the environment (see Kishita, Ohtsuki, and Stewart (2013); McLoughlin and Stewart (2017); Moran, Walsh, Stewart, McElwee, and Ming (2015)). Not only can relational operants be trained, but they are strongly associated with IQ (Colbert et al, 2017), and this is congruent with converging consensus from the fields of neuroscience (Davis et al, 2017), linguistics (Everaert et al, 2015;Goldwater, 2017), evolutionary biology (Wilson & Hayes, 2018), and cognitive psychology (Alexander, 2019;Goldwater, Don, Krusche, & Livesey, 2018;Goldwater & Schalk, 2016;Halford, Wilson, & Phillips, 2010;Kaufman, DeYoung, Gray, Brown, & Mackintosh, 2009) that relational reasoning is central to cognition.…”