Editing Psychological egoism (section)

===Behaviorism===
Traditional [[behaviorism]] dictates all human behavior is explained by [[Classical Conditioning|classical conditioning]] and [[operant conditioning]].  Operant conditioning works through [[reinforcement]] and [[Punishment (psychology)|punishment]] which adds or removes pleasure and pain to manipulate behavior.  Using pleasure and pain to control behavior means behaviorists assumed the principles of psychological hedonism could be applied to predicting human behavior.  For example, [[Edward Thorndike#Thorndike's theory of learning|Thorndike's law of effect]] states that behaviors associated with pleasantness will be learned and those associated with pain will be extinguished.<ref>Young, P. T. (1936). p. 332</ref> Often, behaviorist experiments using humans and animals are built around the assumption that subjects will pursue pleasure and avoid pain.<ref>Young, P. T. (1936) and Mehiel, R. (1997).</ref> Although psychological hedonism is incorporated into the fundamental principles and experimental designs of behaviorism, behaviorism itself explains and interprets only observable behavior and therefore does not theorize about the ultimate cause of human behavior. Thus, behaviorism uses but does not strictly support psychological hedonism over other understandings of the ultimate drive of human behavior.