Recent Issues. Chapter 10: Laurence Smith’s Behaviorism and Logical Positivism. Quote 2 Post author:B. F. Skinner Foundation Post published:March 11, 2019 Post category:Skinner's Quote of the Day “I preferred radical behaviorism, which accepted the existence of private states, but as states of the body, the study of which should be left to physiology.” (p. 110) You Might Also Like Verbal Behavior: Extended Edition. Chapter 10: Supplementary Stimulation. Quote 16 July 7, 2025 Verbal Behavior: Extended Edition. Chapter 5: The Tact. Quote 20 February 13, 2025 Recent Issues. Chapter 11: A New Preface to Beyond Freedom and Dignity. Quote 9 March 26, 2019