“…The controversy may be traced, in part, to two recent books on contemporary behaviorism: Baum's (2005), Understanding Behaviorism: Behavior, Culture, and Evolution (2nd ed. ), and Moore's (2008), Conceptual Foundations of Radical Behaviorism (for reviews, see, e.g., Leigland 2006Leigland , 2009. Although the books cover a number of common themes of importance to contemporary behavioral science, certain differences may be seen in the treatment of specific issues, one of which is the role of private events in a natural science (e.g., Leigland 2010).…”