Behavior Evolution By facebooker_10100120716490131 1900 Behaviorism Theory and Philosophy Thoughts and Feelings Period: 1900 to 2017 Behavior Evolution Period: 1900 to 1930 Behaviorism 1930 Experimental Analysis of Behaviors Skinner and Watson Beginning of exploration of 3-term contingency Emphasis on basic principles of operant behaviors Basic research Period: 1930 to 1950 Experimental Analysis of Behavior Period: 1950 to 1955 Radical Behaviorism Period: 1950 to 1970 Applied Behavioral Analysis Period: 1970 to 2017 Practical Application