What is the effect of collective rationalization within a group?

The effect of collective rationalization within a group is that members discredit contrary warnings. This phenomenon occurs when a group develops a shared understanding or belief that encourages each member to dismiss or minimize opposing viewpoints or evidence. Essentially, collective rationalization leads members to reinforce their existing beliefs and decisions, often ignoring warnings or information that contradicts their group consensus.

This can create an echo chamber effect where the group becomes insular, valuing agreement over critical analysis. The group's commitment to its shared belief can lead to poor decision-making, as important warnings or alternative perspectives are overlooked or dismissed. In this way, collective rationalization plays a significant role in maintaining a unified front, but at the cost of thorough examination of all information and viewpoints.