The study of the manner in which the personality, attitudes, motivations, and behavior of the individual influence and are influenced by social groups http://www.merriam-webster.com/dictionary/social%20psychology According to psychologist Gordon Allport, social psychology is a discipline that uses scientific methods "to understand and explain how the thought, feeling and behavior of individuals are influenced by the actual, imagined or implied presence of other human beings" (1985).
Social psychology looks at a wide range of social topics, including group behavior, social perception, leadership, nonverbal behavior, conformity, aggression and prejudice. It is important to note that social psychology is not just about looking at social influences. Social perception and social interaction are also vital to understanding social behavior.
Brief History of Social Psychology
While Plato referred to the idea of the "crowd mind" and concepts such as social loafing and social facilitation were introduced in the late-1800s, it wasn't until after World War II that research on social psychology began in earnest. The horrors of the Holocaust led researchers to study the effects of social influence, conformity and obedience.
The U.S. government also became interested in applying social psychological concepts to influencing citizens. Social psychology has continued to grow throughout the twentieth century, inspiring research that has contributed to our understanding of social experience and behavior.
How Is Social Psychology Different From Other Disciplines?
It is important to understand how social psychology differs from other disciplines. Social psychology is often confused with folk wisdom, personality psychology and sociology. What makes social psychology different? Unlike folk wisdom, which relies on anecdotal observations and subjective interpretation, social psychology employs scientific methods and the empirical study of social phenomena.