Psychological safety at work
Psychological safety is one of the best-supported ideas in team research, and one of the most misunderstood. It is not about being nice, lowering standards, or avoiding conflict. This note covers where the concept comes from and what the evidence actually shows. It covers how it is measured, and the misreadings that turn a rigorous idea into a slogan.
How this note is governed
Applies to Team leaders and HR practitioners setting team norms. Research synthesis, not a legal rule.
Short answer
Psychological safety is the shared belief that a team is safe for interpersonal risk. Edmondson defined it in 1999, and Google's Project Aristotle found it the strongest differentiator. It raises performance only when paired with high standards.
Published Last verified
Edmondson's 1999 study and the 2017 meta-analytic review were rechecked. The finding that safety needs high standards to raise performance was unchanged.
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Use the meeting, feedback, follow-through, and measurement tools to turn the research into a working team rhythm.
Where these figures come from
6 citations checked, newest check 21 July 2026
- Edmondson, A. C. (1999). Psychological safety and learning behavior in work teams. Administrative Science Quarterly, 44(2), 350-383. The founding study: the definition, the seven-item measure, and the finding that better teams surface more errors because they are safe enough to report them. doi.org doi.org
- Kahn, W. A. (1990). Psychological conditions of personal engagement and disengagement at work. Academy of Management Journal, 33(4), 692-724. The earlier work Edmondson built on: psychological safety as a condition for people to bring themselves fully into a work role. doi.org doi.org
- Frazier, M. L., Fainshmidt, S., Klinger, R. L., Pezeshkan, A., and Vracheva, V. (2017). Psychological safety: A meta-analytic review and extension. Personnel Psychology, 70(1), 113-165. The meta-analysis establishing the links to learning behavior, information sharing, engagement, and performance across 136 samples. doi.org doi.org
- Newman, A., Donohue, R., and Eva, N. (2017). Psychological safety: A systematic review of the literature. Human Resource Management Review, 27(3), 521-535. The systematic review behind the team-level-property and measurement cautions in this note. doi.org doi.org
- Google re:Work. Understand team effectiveness (Project Aristotle). Google’s own write-up of the 180-team study: the five dynamics, psychological safety as the strongest, and the team survey items quoted in this note. rework.withgoogle.com rework.withgoogle.com
- Edmondson, A. C. (2018). The Fearless Organization: Creating Psychological Safety in the Workplace for Learning, Innovation, and Growth. Wiley. The book-length treatment, including the safety-and-standards two-by-two this note’s learning-zone framing comes from. wiley.com wiley.com
Common questions
What is psychological safety?
Psychological safety is the shared belief that a team is safe for interpersonal risk-taking. It means members can ask questions, admit mistakes, raise concerns, and challenge ideas without fear of embarrassment or punishment. Harvard professor Amy Edmondson defined it in 1999.
What did Google’s Project Aristotle find about psychological safety?
Google’s Project Aristotle brought psychological safety to prominence in 2012. It found psychological safety was the strongest differentiator of its highest-performing teams, ahead of who was on the team or how it was structured.
Does psychological safety mean lowering standards?
No. Psychological safety is not about being nice, lowering standards, or avoiding conflict. It raises performance only when paired with high standards. Safety without accountability produces comfort, not results. Safety with accountability produces a learning team.
How is psychological safety measured?
It is most commonly measured with Amy Edmondson’s seven-item team psychological safety scale. That is a short self-report survey asking team members how safe it feels to take interpersonal risks on their team.
Put it to work
Use the meeting, feedback, follow-through, and measurement tools to turn the research into a working team rhythm.
$89Twenty questions about how your team actually handles speaking up, mistakes, help, and standards, read against this construct. Free, about 5 minutes.
FreePsychological safety is built or broken by the manager, and it works only alongside real standards.
FreeSafety is what makes candid feedback possible. SBI is how you deliver it without blame.
FreeThe scripts and playbooks that help a manager build a learning team, not just a comfortable one.
FreeTurn a Team Check result into a plan a manager can run. Start with the Psychological Safety Playbook above, then put the manager scripts and playbooks in the hands of every manager on the team.
Kits
This note is general information about employment practice rather than legal advice for your situation. Check the review date and the jurisdictions above, follow the source link, and confirm the rule before you act on it.