Other human cluster sociologists consider important:
Aggregate: unstructured group of people found in one place but do not interact with each other; important characteristic is common physical location
Social category: an agglomeration where members possess common identifying characteristics but do not interact socially
Collective: crowds, masses, public and social movements are temporary groups; these are clusters of people interacting with each other, but the interaction is temporary or short-lived
Self Categorization Theory proposes that people's appreciation of their group membership is influenced by their perception towards people who are not members of their group
are larger and less intimate, and more specialized groups where members engage in an impersonal and objective- oriented relationship for a limited time.
mutual benefit, rather than emotional affinity, becomes the driving force that compel individuals to stay together in a secondary group.
professional relationships between lawyers and clients, and a corporation that has hundreds of employees are examples of secondary group.
In-groups are groups to which individuals belong and with which they feel a sense of identity
Members of in-groups display positive attitudes and behavior toward their fellow members, while they may exhibit negative attitudes and views toward members of their out-groups
Out-group is a social group toward which a person feels a sense of competition or opposition, and that an individual identifies in a negative direction
A group to which an individual compares himself or herself
A social group that serves as a point of reference in making evaluations and decisions
These groups strongly influence an individual's behavior and social attitudes whether he or she is a member of these groups
Examples of reference groups: an individual's primary group (family, work colleagues, etc.) or his or her in-groups (church, fellow club members, neighbors in the community, etc.)
Household includes all individuals living in the same home, with various models like family, blended families, share housing, and group homes in Anglophone culture
A gang is usually an urban group that gathers in a particular area, less formal than clubs, known to cause social unrest and have negative influences on members
A posse, originating from English common law, is now mainly in America, serving as a law enforcement equivalent of summoning the militia for military purposes or referring to a street group
A dyad is a social group with two members, where social interaction is typically more intense than in larger groups as each member has the other's full attention