Behaviorism according to Craig & Dunn (2010, p.14), is defined as the view that psychology should appropriately focus on observable behavior. Several people have contributed to the study of behaviorism; however, there are five that played a key role in creating what we know today; Ivan Pavlov, Edward Lee Thorndike, John B. Watson, B. F. Skinner and Albert Bandura. Ivan Petrovich Pavlov was born on September 14, 1849 in Ryazan, Russia. His father was a poor village priest who wanted his son to become a priest too. Pavlov planned to become a priest until the age of 21, when he decided he was more interested in a scientific career (Crain, 2011, p.180). For most of his career he devoted himself to physiological research, and in 1904 he won the Nobel Prize for his work on the digestive system. According to Ivan Pavlov.com (2003), the most important dates in his life include 1907, when he was elected an academician of the Russian Academy of Sciences, 1912, he received an honorary doctorate at the University of Cambridge, and 1915, he received the Order of the Legion of Honor. on the recommendation of the Paris Academy of Medicine. He died on February 27, 1936. It was around the time he turned 50 that he began his work on conditioned reflexes; However, for a time he could not decide whether to pursue the implications of his new discovery or continue his previous research. After a long struggle, he began to study the conditioning process (Crain, 2011, pp. 180-181). Pavlov coined classical conditioning "a type of learning in which an association is learned between an environmental event and the ensuing stimulus-response reflex (e.g., a salivary response when a person smells a delicious food, even before ...... middle of paper ......es the influence of the social behavior of others on our learning”, (Craig & Dunn, 2010, p.16). Bobo doll, where he would have three groups of children watch a video in which an adult started to hit the doll and in the end one of them was punished, the other praised and the other had nothing to do with it. all. Then these groups were given their own Bobo doll and he watched to see if they would have the same aggressions as adults. Some of the important moments in his life were: 1953, he began teaching at the University of. Stanford, 1974 served as president of the APA, 1980 received the APA Distinction Award. Scientific Contributions and Outstanding Contributions to Psychology in 2004 by the American Psychological Association (Cherry, 2010). He is currently still alive and teaching at Stanford University..