“…According to RFT, it may be appropriate to consider perceptual‐ and relational‐based concept learning as instances of nonarbitrarily relational responding, and associative‐based concept learning as instances of arbitrarily applicable relational responding (Dymond & Roche, ; Hayes, Barnes‐Holmes & Roche, ). Nonarbitrary relational responding involves responding based on the nonarbitrary or formal properties of the stimuli being related (e.g., such as the color or shape [perceptual similarity] of the stimuli; see Giurfa, Zhang, Jenett, Menzel, & Srinivasan, ; Stewart & McAlwee, ). On the other hand, arbitrarily applicable relational responding is “based not on any nonarbitrary or formal relations between the stimuli being related but on aspects of the context that specify the relation such that the relational response can be brought to bear on any relata regardless of their nonarbitrary properties.” (Stewart & McAlwee, p. 312).…”