group polarization 244
group polarization
DESCRIPTION
The tendency for discussion among members of a group to result in more
extreme attitudes, opinions, inclinations, and decisions of group members.
KEY INSIGHTS
Based on research by Moscovici and Zavalloni (1969) and earlier
researchers, the group polarization phenomenon has been experimen-
tally observed as a significant tendency in many groups. A particular form
of group polarization is the risky shift effect, also referred to as choice
shift, where group decisions are found to be riskier than the average
of the individual decisions of the members before the group has met.
Explanations for the group polarization phenomenon tend to be based on
mechanisms related to social comparison (e.g. where culturally, people
tend to admire riskiness rather than caution in most circumstances) as
well as informational influences (e.g. where individual choices are based
on weighing remembered pro and con arguments).
KEY WORDS Groups, decision making, choice, risk
IMPLICATIONS
Marketers must be aware of how participation in groups, whether in a
group of an organization’s employers or in a group of consumers, can lead
to views which are more extreme than those of individuals prior to group
participation or where views are amplified and shift in the direction
of dominant norms. The effect may present itself in the form of more
extreme attitudes, opinions, or riskier decisions. Assessing individual
views prior to group discussions and decision making and comparing
individual views with group views is one way to identify the extent of
group polarization.
APPLICATION AREAS AND FURTHER READINGS
Decision Making
Whitney, John C., and Smith, Ruth A. (1983). ‘Effects of Group Cohesiveness on
Attitude Polarization and the Acquisition of Knowledge in a Strategic Planning
Context,’ Journal of Marketing Research, 20(2), May, 167–176.
Consumer Behavior
Rao, Vithala R., and Steckel, Joel H. (1991). ‘A Polarization Model for
Describing Group Preferences,’ Journal of Consumer Research, 18(1), June, 108–
118.
Woodside, Arch G. (1974). ‘Is There a Generalized Risky Shift Phenom-
enon in Consumer Behavior?’ Journal of Marketing Research, 11(2), May, 225–
226.
Ward, James C., and Reingen, Peter H. (1990). ‘Sociocognitive Analysis of
Group Decision Making among Consumers,’ Journal of Consumer Research, 17(3),
December, 245–262.
Sia, C. L., Tan, B. C. Y., and Wei, K. K. (2002). ‘Group Polarization and Computer-
Mediated Communication: Effects of Communication Cues, Social Presence, and
Anonymity’, Information Systems Research, 13(1), 70–90.
BIBLIOGRAPHY
Moscovici, S., and Zavalloni, M. (1969). ‘The Group as a Polarizer of Attitudes,’
Journal of Personality and Social Psychology, 12, 125–135.