Mark's refusal to testify against his colleagues demonstrates a tendency to maintain group cohesion and a perception of unanimity, potentially suppressing dissent within the group.
- Mark and his colleagues are being accused of corrupt practices in their police department.
- When Mark declines to testify against his colleagues and refrains from speaking about their activities, his behavior exemplifies the tendency to prioritize group cohesion over critical thinking, which might lead to poor decision making.
- This is especially likely to occur when there is a perceived unanimity among the group members, and it may also be influenced by the quashing of dissenting group members' opinions and the avoidance of generating tension within the group.