Aggregate: individuals who temporarily share the same physical space but who do not see themselves as belonging together. Category: people, objects, and events that have similar characteristics and are classified together. Interact over time: have a sense of identity or belonging, ha(cid:448)e (cid:374)o(cid:396)(cid:373)s that (cid:374)o(cid:374)(cid:373)e(cid:373)(cid:271)e(cid:396)s do(cid:374)(cid:859)t ha(cid:448)e. A small group characterized by intimate, long-term, face-to-face association and cooperation. Compared with primary: larger, relatively temporary, more anonymous and more formal (statuses such as president, manager, worker, more impersonal, based on some interest or activity, tend to break into primary groups of friends. Out-groups: groups toward which we feel antagonism. Sociological significance of in-groups: shapes perception of the world, shapes views of right and wrong, shapes behavior. A group whose standard we refer to as we evaluate ourselves. Examples: families, schools, co-workers, class-mates, facebook friends, religious community members. Social networks: the social ties radiating outward from the self that link people together.