Group cohesiveness

In survivor, social loafing has been demonstrated through the brain group. Everyone was put in groups based on an aspect of themselves, but I think the group that stayed the most united was the brains. They worked together as a team and when separated still counted on each other for later in the game. I don't think any other group had such a strong bond.

Group cohesiveness can be defined as a bond that pulls people toward membership to a particular group and resists separation from that group.