Psychological Safety

What is Psychological Safety?

Psychological safety is a shared belief among members of a team that the team is safe for interpersonal risk-taking. In a psychologically safe team, people feel able to ask questions, offer ideas, raise concerns, disagree and admit mistakes without fear of being punished, humiliated or rejected. The definition comes from Harvard Business School professor Amy Edmondson's 1999 study of work teams, which made psychological safety one of the most studied ideas in organizational psychology.

Edmondson stresses that psychological safety is about candor, not comfort. In her 2018 book The Fearless Organization, she describes it as a climate in which people are comfortable expressing and being themselves. It describes the team or workplace climate, not an individual's personality, which is why members of the same organisation can experience very different levels of safety depending on their team and manager.

Origins of the idea

The term first appeared in the 1960s, when MIT organisational scholars Edgar Schein and Warren Bennis argued that people need psychological safety to cope with the anxiety of organisational change and learning. Psychologist William Kahn later linked it to employee engagement in 1990. Edmondson's contribution was to treat it as a team-level property and to show, with data, how it relates to learning and performance.

What psychological safety is not

• Not just being nice. Safe teams disagree openly; politeness that suppresses dissent can reduce safety.
• Not lowering standards. Edmondson's framework pairs safety with accountability: high safety plus high standards produces a "learning zone," while high safety with low standards produces a "comfort zone."
• Not consensus. Diverse views and debate are the point.
• Not freedom from consequences. Clear misconduct still has consequences; safety means honest mistakes and dissent are treated as useful information.

The four stages model

A popular practitioner framework comes from Timothy R. Clark's 2020 book The 4 Stages of Psychological Safety, which is separate from Edmondson's research and has not been extensively tested. It describes a progression:

Why Psychological Safety Matters

Impact on learning and performance

Psychological safety matters mainly because it enables learning behavior: seeking feedback, sharing information, asking for help, discussing errors and experimenting. In Edmondson's 1999 study of 51 teams at a manufacturing company, psychological safety predicted learning behavior, which in turn predicted team performance.

A 2017 meta-analysis by M. Lance Frazier and colleagues, combining data from more than 22,000 individuals and around 5,000 groups, found that psychological safety was associated with information sharing, learning behavior, engagement, task performance and satisfaction. Its effects tend to be stronger in complex, uncertain and interdependent work, such as healthcare, research and software development, where no one person has all the answers.

Effects on innovation, decisions and wellbeing

When people feel safe, novel ideas are more likely to be voiced and tested, and failure becomes a source of learning. Decisions improve because more information surfaces, assumptions are challenged and problems are spotted early, reducing the risk of groupthink. Psychological safety is also linked with engagement, lower turnover intentions and better wellbeing, while chronic fear of speaking up contributes to stress and disengagement. See workplace mental health.

When psychological safety is absent

Low psychological safety leads people to stay silent to protect themselves, a pattern researchers call employee silence. Critical information is withheld, mistakes are hidden until they compound, ideas go unspoken and blame replaces learning. Investigations of disasters in aviation, healthcare and engineering repeatedly find that someone noticed a problem but did not feel able to raise it, or was not heard. Aviation's crew resource management training, developed after accidents in which junior crew members hesitated to challenge captains, is an early example of deliberately building speak-up culture.

Research Foundations

Edmondson's hospital study

Edmondson's interest began with a surprising finding. Studying hospital nursing units in the early 1990s, she expected better-led, better-functioning teams to make fewer medication errors. Instead, they reported more. On closer investigation, the difference appeared to lie in reporting rather than in mistakes: in units where nurses felt safe, errors were discussed openly; in units with punitive managers, they were hidden. She published the findings in 1996, and they set the course of her later research.

Google's Project Aristotle

Between 2012 and 2015, Google's People Analytics team studied around 180 teams to understand what made some more effective than others. Team composition, such as personalities or skills mix, mattered less than how teams worked together. The researchers identified five key dynamics:

1. Psychological safety: can we take risks on this team without feeling insecure or embarrassed?
2. Dependability: can we count on each other to do high-quality work on time?
3. Structure and clarity: are goals, roles and plans clear?
4. Meaning: are we working on something personally important?
5. Impact: do we believe the work matters?

Google reported that psychological safety was by far the most important of the five and underpinned the others. According to its re:Work summary, people on teams with higher psychological safety were less likely to leave, more likely to harness diverse ideas, brought in more revenue and were rated as effective twice as often by executives. Project Aristotle was an internal study rather than peer-reviewed research, but it brought the concept to a wide audience.

What happens in the brain under threat

Social threats, such as fear of humiliation or rejection, activate the same stress systems as physical danger, the fight-or-flight response. Under acute stress, people tend to narrow their focus and favour safe, habitual responses, which can make creative thinking and open discussion harder. Popular accounts sometimes overstate the neuroscience, but the basic idea that perceived interpersonal threat changes behavior is well supported.

Key research findings

• Teams with higher psychological safety engage in more learning behavior and learn more from failure.
• Team leader behavior is one of the strongest predictors of team psychological safety.
• Psychological safety varies more between teams than between organisations, highlighting the role of local leadership.
• It interacts with other factors: for example, it appears to help diverse teams benefit from their differences.
• Researchers widely observe that it builds slowly and can be damaged quickly, for instance by a leader's dismissive response to bad news.

Building Psychological Safety

Edmondson's three-part leader toolkit

1. Set the stage. Frame the work as a learning problem rather than a simple execution task. Acknowledge uncertainty and interdependence, and explain why everyone's input matters. For example: "This is new territory. I don't have all the answers, and I need everyone's perspective to get this right."
2. Invite participation. Show situational humility, ask genuine questions and create structures for input. Questions such as "What am I missing?", "What concerns do you have?" and "What would you do differently?" signal that voice is wanted.
3. Respond productively. Express appreciation when people speak up, treat failures as opportunities to learn, and address genuine violations clearly. For example: "Thank you for raising that. Let's figure out what we can learn from it."

Meeting practices

Structures make speaking up less dependent on individual courage. Short check-ins at the start of meetings build connection. Round-robins or writing ideas down before discussion ensure quieter voices are heard. Separating idea generation from evaluation prevents early criticism from shutting ideas down. Leaders who speak last avoid anchoring the group on their view.

Communication and decision norms

Teams build safety by defaulting to transparency, making disagreement explicitly welcome, following up on concerns raised, and being clear about who makes each decision and how. Explaining the reasoning behind decisions, welcoming questions about them and openly correcting poor decisions show that input is taken seriously. See communication skills and conflict resolution.

Team agreements

Many teams find it helpful to agree explicitly how they will raise concerns, handle disagreement, give and receive feedback, treat mistakes and recognise contributions. Revisiting these agreements in regular retrospectives keeps them alive.

Leader Behaviors That Build Safety

Foundational leadership actions

These behaviors overlap with what researchers call inclusive leadership. For more on how leaders influence groups, see leadership psychology.

Handling mistakes and failures

Edmondson distinguishes three kinds of failure. Preventable failures occur in routine work when known processes are not followed; the response is to fix systems and processes, not simply to blame the person. Complex failures arise from novel combinations of factors in complicated systems; the response is careful analysis and sharing lessons widely. Intelligent failures come from thoughtful experiments in new territory; the response is to value the learning even if the result disappoints. Useful questions after any failure are: What happened? What can we learn? What will we do differently? How will we share this?

Giving feedback safely

Feedback supports safety when it focuses on specific behavior rather than character, is timely, invites the other person's view ("How do you think that went?"), and is a two-way conversation. Starting from curiosity rather than judgment helps.

Modeling appropriate vulnerability

Leaders build safety by admitting when they do not know something, sharing their own mistakes and what they learned, asking for help and acknowledging uncertainty about decisions. This works best when it is genuine and balanced with clear direction.

Common Barriers to Psychological Safety

Organizational barriers

Individual and team barriers

Individuals may hold back because of impression management (wanting to look competent), fear of retaliation, low confidence, cultural norms about deference to authority, past experiences of being punished for speaking up, or a preference for harmony over honesty. At the team level, cliques, unequal participation, unresolved conflicts and low trust all suppress voice. See team dynamics and group dynamics.

Overcoming barriers

Organisations can make psychological safety an explicit value, include safety-building behaviors in leadership development and reviews, and address toxic behavior quickly, including bullying and harassment. Flattening hierarchy in specific forums, having leaders speak last and offering anonymous channels help where status differences are large. For individuals, starting with low-risk opportunities to contribute, recognising every contribution and mentoring build confidence over time.

Measuring Psychological Safety

Edmondson's team survey

Edmondson's 1999 measure asks team members to rate seven statements, typically on a seven-point scale from strongly disagree to strongly agree:

1. If you make a mistake on this team, it is often held against you. (reverse-scored)
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. (reverse-scored)
4. It is safe to take a risk on this team.
5. It is difficult to ask other members of this team for help. (reverse-scored)
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 utilized.

Because psychological safety is a team property, researchers average responses across members and check that members largely agree before interpreting a team score.

Observable indicators

In high-safety teams, questions, concerns and ideas flow freely; disagreement happens openly; mistakes and problems are reported early; people ask for help; feedback moves in all directions; and the team reflects on its experience. Warning signs of low safety include silence when input is requested, problems surfacing late, "meetings after the meeting," automatic deference to authority, the same few people always speaking, hidden or blamed mistakes and high turnover, particularly among under-represented staff.

Regular assessment methods

Organisations combine short pulse surveys, focus groups, one-to-one conversations, team retrospectives and exit interviews. Data is most useful when leaders act on it visibly; asking for feedback and then ignoring it can reduce safety.

Taking Action

For leaders

A practical starting sequence is to reflect on and seek feedback about your own responses to bad news; signal change by sharing what you are learning and admitting a mistake; build structures such as check-ins, round-robins and retrospectives; and reinforce progress by thanking people who speak up and following through on what they raise. Small, consistent signals over weeks matter more than a single announcement.

For team members

You do not need to be a manager to contribute. You can model the behavior by asking questions and admitting mistakes, thank colleagues who raise concerns, invite quieter people into discussions, interpret others charitably, give constructive feedback and respectfully address behavior that shuts people down.

For organizations

At scale, organisations can train leaders in safety-building behaviors, consider them in selection and promotion, make failure analysis routine and blame-free, set norms for respectful dialogue, build inclusion and track psychological safety over time.

Quick wins

• Start your next meeting with "What questions do you have?"
• When someone admits a mistake, respond with "Thank you for telling me."
• Ask "What am I missing?" before your next decision.
• Share something you are uncertain about.
• After someone speaks up, follow up on what they said.

Criticisms and limits

Psychological safety is not a cure-all. Researchers note that it can be confused with comfort or used as a slogan without real change, that most evidence is correlational, and that it must be combined with clear goals, accountability and competence to improve performance. Some studies suggest it can reduce motivation when standards are unclear. Used well, though, it remains one of the best-supported ideas about how teams learn and perform.