Social psychology the scientific study of the feelings, thoughts and behaviors of individuals in social situations. Social psychologists test intuitions by devising studies and crafting experiments that successfully isolate the causes of behavior in social situations. Social psychologists study situations in which people exert influence over one another, as well as the ways people respond to influence attempts of various kinds. Personality psychology stresses individual differences in behavior: try to find a consistence pattern in the way an individual behaves across situations to find an individual"s position on a trait. Social psychology is the study of how people perceive, think about, and remember aspects of the world: more likely to study categorization processes or memory for words or objects. Sociology is the study of behavior of people in the aggregate: study institutions, subgroups, bureaucracies, mass movements, and changes in the demographic characteristics of populations.