Upon Further Reflection. Chapter 6: The Evolution of Verbal Behavior. Quote 10 Post author:B. F. Skinner Foundation Post published:June 12, 2020 Post category:Skinner's Quote of the Day “One learns to gesture through movement duplication but to speak through product duplication, which is more precise.” (p. 80) You Might Also Like Science and Human Behavior, Chapter 3: Why Organisms Behave, Quote 6 February 2, 2016 Science and Human Behavior, Chapter 5: Operant Behavior, Quote 22 March 21, 2016 About Behaviorism, Introduction, Quote 9 January 16, 2017