Editing Group dynamics (section)

===Group formation===
Group formation starts with a psychological bond between individuals. The ''social cohesion approach'' suggests that group formation comes out of bonds of [[interpersonal attraction]].<ref name=HoggW/> In contrast, the ''[[social identity approach]]'' suggests that a group starts when a collection of individuals perceive that they share some social category (‘smokers’, ‘nurses,’ ‘students,’ ‘hockey players’), and that interpersonal attraction only secondarily enhances the connection between individuals.<ref name=HoggW/> Additionally, from the social identity approach, group formation involves both identifying with some individuals and explicitly ''not'' identifying with others. So to say, a level of psychological ''distinctiveness'' is necessary for group formation. Through interaction, individuals begin to develop group norms, roles, and attitudes which define the group, and are internalized to influence behaviour.<ref>Sherif, M. (1936). ''The psychology of social norms.'' New York: Harper.</ref>

''Emergent groups'' arise from a relatively spontaneous process of group formation. For example, in response to a natural disaster, an ''emergent response group'' may form. These groups are characterized as having no preexisting structure (e.g. group membership, allocated roles) or prior experience working together.<ref name=Emergent>{{Cite journal | last1 = Majchrzak | first1 = A. | last2 = Jarvenpaa | first2 = S. L. | last3 = Hollingshead | first3 = A. B. | title = Coordinating Expertise Among Emergent Groups Responding to Disasters | doi = 10.1287/orsc.1060.0228 | journal = Organization Science | volume = 18 | pages = 147–161 | year = 2007 | s2cid = 43354804 }}</ref> Yet, these groups still express high levels of interdependence and coordinate knowledge, resources, and tasks.<ref name=Emergent/>