So what was the most important factor contributing to a team’s effectiveness?
It was psychological safety.
Simply put, psychological safety refers to an individual’s perception of taking a risk, and the response his or her teammates will have to taking that risk.
Google describes it this way:
In a team with high psychological safety, teammates feel safe to take risks around their team members. They feel confident that no one on the team will embarrass or punish anyone else for admitting a mistake, asking a question, or offering a new idea.
In other words, great teams thrive on trust.