Answer:
Groupthink
Step-by-step explanation:
Groupthink is a situation where a group's analysis of a problem is interfered with because of a pressure to conform with a group, leading generally to poor decision making. Usually, as a group, better ideas and decision making should be obtained as different individuals brainstorm however, when a group is in a gathering where new ideas are rejected, the group members conform to the decision previously made which may or may not be efficiently effective.
Irving Janis coined the phrase groupthink in the 1970s. He defines groupthink as: "a mode of thinking people engage in when they are deeply involved in a cohesive in-group, when the members' striving for unanimity override their motivation to realistically appraise alternative courses of action. Groupthink refers to a deterioration of mental efficiency, reality testing, and moral judgment that results from in-group pressures."