Extreme cohesiveness in a group can lead to which phenomenon?

Groupthink

4. Cohesiveness: Cohesiveness refers to the togetherness, bonding, or mutual attraction among group members. As a group becomes more cohesive, members start to think, feel, and act as a unified social unit rather than isolated individuals. Cohesiveness is associated with team spirit, a sense of belongingness, and a "we feeling." It becomes difficult to leave a highly cohesive group or gain membership in such a group. However, extreme cohesiveness may not always be beneficial for a group. Psychologists have identified the phenomenon of groupthink, which is a consequence of excessive cohesiveness , as it can hinder critical thinking and decision-making within the group.