what is group polarisation?

Group polarization is a group influence which refers to the strengthening of groups initial position as a result interaction and discussion.
As a result of group discussion opinion shifts towards more extreme positions than those whicfi they initially held.
In group polarization, it has been found that groups are more likely to take extreme decisions than individuals alone. Group polarization occurs due to the following factors:
(i)In the company of like-minded people, people are likely to hear newer arguments favouring their view-points.
(ii)When people find others also favouring their view-point, they feel that their view is validated by the public. This is a sort of bandwagon effect.
(iii)When people find others having similar views, they are likely to perceive them as in-group.