  Other nomenclature is sometimes used to classify behaviorisms. Georges Rey (1997, p. 96), for example, classifies behaviorisms as methodological, analytical, and radical, where “radical” is Rey’s term for what I am classifying as psychological behaviorism. I reserve the term “radical” for the psychological behaviorism of B. F. Skinner.  Skinner employs the expression “radical behaviorism” to describe his brand of behaviorism or his philosophy of behaviorism (see Skinner 1974, p. 18). In the classification scheme used in this entry, radical behaviorism is a sub-type of psychological behaviorism, primarily, although it combines all three types of behaviorism (methodological, analytical, and psychological).