What Is Psychological Safety? A Guide for Leaders and Teams

In 2012, Google launched Project Aristotle — a multi-year study to identify what made some of its teams significantly more effective than others. The hypothesis was that team composition would be the determining factor: the best teams would be those with the most talented individuals.

The finding was more interesting. The single strongest predictor of team performance was not who was on the team. It was whether team members felt safe to take interpersonal risks. The research term for this is psychological safety.

What Psychological Safety Means

Psychological safety was defined by Harvard professor Amy Edmondson as "a belief that one will not be punished or humiliated for speaking up with ideas, questions, concerns, or mistakes." It is a shared belief — a property of the team environment, not of individual personalities.

In a psychologically safe team:

• People raise problems before they become crises
• People admit mistakes without fear of punishment
• People challenge ideas — including the leader's ideas — when they disagree
• People ask for help when they need it
• People take intelligent risks, knowing that failure is an opportunity to learn rather than a reason for blame

In a psychologically unsafe team, the opposite is true. People withhold information that might make them look bad. They agree in meetings and disagree in corridors. Problems surface late, when they are hardest to resolve. Ideas that challenge the status quo are suppressed before they can be tested.

The implications for organisational performance are substantial. Innovation requires psychological safety. So does learning. So does effective risk management. Organisations that look safe on the outside — where there is no visible conflict and everyone appears to be aligned — are often organisations where genuine safety is entirely absent.

Psychological Safety Is Not Comfort

One of the most important clarifications is what psychological safety is not. It is not the absence of challenge, accountability, or high standards. It is entirely possible — and highly desirable — to create an environment that is psychologically safe and also demanding.

Edmondson uses the term "learning zone" to describe teams that have both high psychological safety and high performance standards. These teams are challenging but not threatening. They push people to their best rather than punishing them for their worst.

The "comfort zone" — high safety, low standards — is equally dysfunctional. People feel fine but do not grow. Performance plateaus. The goal is not to make people comfortable. It is to make it safe for them to do difficult things.

What Creates and Destroys Psychological Safety

Leader behaviour is the most important variable

Research consistently shows that leader behaviour shapes the psychological safety of a team more powerfully than any other factor. Specifically:

What builds it:

• Admitting your own mistakes openly
• Asking genuine questions and listening to the answers
• Responding to bad news as useful information rather than evidence of failure
• Explicitly inviting challenge and dissent
• Following through on commitments
• Treating team members with consistent respect, regardless of status

What destroys it:

• Reacting to mistakes with blame, even subtle blame
• Dismissing ideas without genuine consideration
• Signalling — through body language, tone, or behaviour — that challenge is unwelcome
• Behaving differently with different people in ways that feel arbitrary
• Making people feel foolish for raising questions or admitting uncertainty

The asymmetry matters: safety-destroying behaviours have a faster and stronger effect than safety-building ones. A single episode of visible punishment for speaking up can undo months of safety-building.

Conversational norms matter too

Teams develop informal rules about what is and is not safe to say. These norms emerge from accumulated experience — how previous challenges to the status quo were received, whether mistakes were discussed openly or quietly buried, whether quiet agreement was rewarded more than honest dissent.

Leaders can actively shape these norms by being explicit about them ("I want you to challenge me when you disagree — it makes the decision better") and by consistently demonstrating that they mean it.

How to Measure Psychological Safety

Edmondson's original seven-item survey is the most widely used tool:

1. If you make a mistake on this team, it is often held against you.
2. Members of this team are able to bring up problems and tough issues.
3. People on this team sometimes reject others for being different.
4. It is safe to take a risk on this team.
5. It is difficult to ask other members of this team for help.
6. No one on this team would deliberately act in a way that undermines my efforts.
7. Working with members of this team, my unique skills and talents are valued and utilised.

Short pulse surveys using adapted versions of these items give leaders regular, actionable data on the safety climate of their teams.

Practical Steps for Leaders

Start with yourself. The single most powerful thing a leader can do is model the behaviour they want to see. That means admitting your own uncertainty in front of your team. Saying "I was wrong about that" when you were wrong. Genuinely exploring ideas that challenge your own thinking.

Separate learning and performance conversations. When a project fails, have an explicit "what can we learn from this" conversation before any performance conversation. The two conversations serve different purposes, and mixing them conflates learning with punishment.

Create deliberate inclusion. In team meetings, create structures that ensure quieter voices are heard. Ask specific people for their perspective. Use techniques like pre-meeting reflection questions to give people time to form and articulate their views before they are under social pressure.

Respond visibly to difficult news. When someone brings you bad news — a project is behind, a client is unhappy, a mistake has been made — your response is watched carefully by everyone present. Responding with calm curiosity rather than visible frustration sends a powerful signal about safety.

Psychological safety is not a programme. It is a daily practice. It requires consistent, deliberate attention — because the alternative develops very naturally, in the absence of that effort.

References

Edmondson, A.C. (1999) 'Psychological Safety and Learning Behavior in Work Teams', Administrative Science Quarterly, 44(2), pp. 350–383.

Edmondson, A.C. (2018) The Fearless Organisation. Hoboken, NJ: Wiley.

Duhigg, C. (2016) 'What Google Learned From Its Quest to Build the Perfect Team', The New York Times Magazine, 25 February.