What is Psychological Safety?
Psychological safety is a team climate where individuals feel safe to take interpersonal risks — asking questions, admitting mistakes, proposing ideas, and challenging the status quo — without fear of punishment, humiliation, or career damage.
Psychological safety is a team climate where individuals feel safe to take interpersonal risks — asking questions, admitting mistakes, proposing ideas, and challenging the status quo — without fear of punishment, humiliation, or career damage. Research by Amy Edmondson (Harvard) shows it is the #1 predictor of team effectiveness.
Google's Project Aristotle confirmed this finding: across 180 teams, psychological safety was the strongest predictor of team performance, above talent density, experience, or resources. Teams with high psychological safety make more mistakes visible faster, learn quicker, and innovate more.
Why It Matters
In engineering, psychological safety determines whether bugs get surfaced early (cheap to fix) or hidden until production (catastrophically expensive). Blameless postmortems only work if teams feel safe reporting incidents.
Frequently Asked Questions
What is psychological safety?
A team climate where people feel safe taking risks — asking questions, admitting mistakes, proposing ideas — without fear of punishment. The #1 predictor of team effectiveness per Google's Project Aristotle.
How do you measure psychological safety?
Edmondson's 7-item survey. Key indicator questions: "If I make a mistake, it is held against me" (reversed) and "It is safe to take a risk on this team."
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