The evolution of behaviorism”

Answer the following questions:
1) Discuss the evolution of behaviorism from its origins with Watson, Pavlov, and Skinner to the contemporary theories of behaviorism and cognitive-behavior theory.
2) What has changed?
3) What has remained the same?
4) How are these theories used today?
This paper must include a minimum of two references in addition to the required textbook articles in the chapters.
a)  Use the textbook by: Goodwin, C. J. (2009).  A history of modern psychology (4th  ed.).  Hoboken, NJ: Wiley.  Sharps,