How to Build Psychological Safety – According to Research

Psychological safety is one of the most well-studied factors behind high-performing teams. Research from Harvard and Google shows that this factor—more than talent, experience, or resources—explains why some teams succeed and others do not. Yet few organizations actively and systematically work to build it. This article summarizes what the research says and what you as a leader can do in practice.

What is psychological safety?

Psychological safety is defined as a shared belief within a team that it is safe to take interpersonal risks. It means that team members feel they can speak their minds—ask questions, raise concerns, share ideas, and admit mistakes—without fear of ridicule, punishment, or exclusion.

The concept was coined by Amy Edmondson, professor at Harvard Business School, and has since become one of the most cited and applied frameworks in leadership and organizational development. It is important to distinguish psychological safety from harmony or friendliness. A psychologically safe team does not need to be a conflict-free team—quite the opposite. It is a team where disagreements and criticism are handled openly and constructively.

Google’s Project Aristotle – why it matters

In 2012, Google launched an internal research project called Project Aristotle with the aim of understanding what makes a team successful. Researchers analyzed more than 180 teams and hundreds of variables—everything from composition and competence to work habits and personality traits.

The finding was clear: the single most important factor was psychological safety. More than individual talent, more than clear roles, more than external motivation. Teams with high psychological safety had lower turnover, generated more revenue, and received higher ratings from their managers.

The research shows that psychological safety is not a “soft” issue—it is a business-critical prerequisite for learning, innovation, and performance.

Four stages of psychological safety

Edmondson and her colleagues describe psychological safety as something that develops through four stages within a team or organization:

1. Inclusion safety – Do all team members feel welcome and accepted as they are? This is the foundation. Without inclusion, there is no safety.

2. Learner safety – Do team members dare to ask questions, admit that they do not understand something, and learn from mistakes without feeling shame?

3. Contributor safety – Do employees feel that their ideas and perspectives are welcome and valued—even when they differ from the majority?

4. Challenger safety – Can team members question the status quo, challenge decisions, and point out risks without it being perceived as a breach of loyalty?

Most teams and organizations get stuck at stage one or two. The fourth stage—daring to challenge—is the hardest to achieve but also creates the greatest value in terms of innovation and risk management.

How leaders build psychological safety in practice

Psychological safety is not built with a workshop or a policy document. It is the result of a leader’s behaviors, structures, and norms repeated day after day.

Be open about your own uncertainty. Leaders who acknowledge that they do not have all the answers, ask for help, and share their own mistakes normalize vulnerability and lower the threshold for others to do the same.

Actively welcome bad news. How you react when someone raises a problem or failure determines whether they—and others—will do so again. Respond with curiosity, not criticism.

Ask questions instead of giving answers. Leaders who ask genuine questions and listen to the responses create a climate where everyone feels that their perspective matters.

Protect dissenting voices. When someone raises an uncomfortable perspective—acknowledge it. Even if you disagree. This signals that difference is an asset, not a threat.

Create structures for safe feedback. Regular feedback cycles, retrospectives, and anonymous channels make it possible for more people to contribute—not only those who are most comfortable speaking up.

Common mistakes that undermine psychological safety

Many leaders want to build psychological safety but inadvertently do things that work against it. Some of the most common mistakes:

Punishing those who raise problems. Even subtle reactions—a sigh, a dismissive gesture, or a tone that signals irritation—are enough to shut down openness.

Letting hierarchy silence voices. If it is always the senior people who speak and the junior ones who listen, a power structure is reproduced that makes honesty more difficult.

Confusing safety with consensus. Psychological safety does not mean that everyone has to agree—it means that everyone dares to say what they think, and that decisions can be made with full information.

Focusing on symptoms rather than culture. Installing anonymous feedback tools does not help if the underlying culture is fundamentally defensive or punitive.

Measurement – how do you know where you stand?

Psychological safety can and should be measured. Edmondson’s original scale contains seven statements that team members rate, for example: “In this team, it is easy to raise difficult issues” or “No one in this team would deliberately undermine another person’s efforts.”

The results provide a baseline and make it possible to track progress over time. Combined with qualitative conversations and observation of meeting behaviors, they give a clear picture of where the team stands—and what needs to change.

Frequently asked questions

Is psychological safety the same as “everyone liking each other”? No. It is about trust and respect, not about avoiding disagreement. Psychologically safe teams can have tough discussions—but they do so without attacking one another.
Can psychological safety be measured? Yes. Edmondson’s validated scale is the most common tool. Survey data is often combined with observation and dialogue-based methods.
How long does it take to build psychological safety? It depends on the starting point and the consistency of leadership. Noticeable changes can happen within a few months—but it is ongoing work, not a project with an end date.
Is psychological safety relevant in all types of organizations? Yes. Research shows positive effects across healthcare, technology companies, manufacturing, and the public sector.
What is the quickest way to destroy psychological safety? Reacting negatively—openly or subtly—when someone takes an interpersonal risk. A single incident is enough to make many people choose silence from that point on.

Contact us

Training in psychological safety for leaders and managers
Measurement and analysis of psychological safety in your teams
Coaching for leaders in changing behaviors that undermine openness
Facilitation of team dialogues and retrospectives
Support in creating structures and norms that encourage learning and honesty
Organizational development focused on trust, culture, and psychological safety
Workshops and presentations based on Amy Edmondson’s and Google’s research
Long-term work to shift culture toward higher psychological safety