A group can be as large as a crowd at a Cardinals baseball game or as small as you and your best friend.
Social interaction has to do with the way in which people act toward or respond to one another.
The subject matter of sociology ranges from parent-child relationships to hostile mobs, from inequality and nature of racism and sexism to courtship and marriage, from education to health care, from conformity to deviance. Sociologists carefully use evidence, collected through research, to explain the social patterns that occur in society and in culture. In doing so, the sociologist is able to uncover social phenomena that have similar causes and effects. This research may be done through a historical approach, actively participating in a group, observing a group in interaction, through surveys or interviews with random samples or by performing an experiment. The phenomena that each sociologist chooses to study will elicit a specific research method.