Cohesion

Cohesion is needed for a effective group  Task cohesion  This is where you might not like the person but you both know you have a job to do and you get it done. A good example of this would be Ribery and Robben at their primes in Byrne Munich. (link) This link shows they started

Group process // Leadership!

Tuckman (1965) suggest that, to become a team a group must go through 4 development stages (listed below). Each group varies with what stage they are at and how fast/slow they progress through (or how long they stay in each one) In most cases a team will revert back to one, ounces a new player