How much do team members stick together?

Scientifically, the concept of how much team members stick together is called team cohesion. It is a shared attraction and sense of pride among team members and is widely regarded as an essential aspect of overall team functioning, and is also one of the earliest and most widely studied team constructs.

A large number of studies have demonstrated a positive relationship between team cohesion and team performance.
It is also possible to distinguish between task and social cohesion. Task cohesion represents the team’s shared investment in achieving a common objective while social cohesion is driven by the team’s social and emotional elements. Research shows that task cohesion is more likely to enhance team’s performance.

Grossman, R., Nolan, K., Rosch, Z., Mazer, D., & Salas, E. (2022). The team cohesion-performance relationship: A meta-analysis exploring measurement approaches and the changing team landscape. Organizational Psychology Review, 12(2), 181–238.