“…The animal and the experimenter comprise a small but genuine verbal community. (p. 108) This note has been interpreted, not just by Hayes et al (2001) but by several others in the field of behavior analysis (e.g., see Leigland, 1997;Michael & Malott, 2003;Normand, 2009;Palmer, 2008), as stating that all animal behavior in operant learning experiments is verbal because the reinforcement is directly or indirectly delivered by the experimenter, who was trained to do so (for a different understanding of Skinner's stand on this issue, see Osborne, 2003;Passos, 2007;and Vargas in Arntzen, 2010). As we will explore in the next section, it is possible that this is not what Skinner meant by his footnote, and the fact that so many scholars interpreted it in a way arguably not intended by Skinner might be partially explained by the point made by Malott and Peterson discussed above, that is, that mediation by others became the most conspicuous feature in the definition of verbal behavior.…”