Brilliant thought leaders have nailed definitions, like Amy Edmondson’s “a belief that people won't be punished or humiliated for speaking up with ideas, questions, concerns, or mistakes”; Tim Clark’s “an environment where people feel safe taking interpersonal risks without fear of being embarrassed, marginalised, or punished”.

To add to this, I ask leaders for their thoughts in sessions, here’s some…

So why do some teams keep winning?

Two in five colleagues does not feel safe to speak up, share an idea, or admit a mistake without fear of embarrassment (IPSOS). They are sitting on the exact thing that could solve the challenge or problem you’re discussing.

The untapped competitive advantage is right in front of you.

The evidence is stacked:

📊 Google's Project Aristotle — 2 years, 250 teams, 180 variables. Psychologically safe teams: 19% more productive, 31% more innovative, 27% less turnover, 3.6x more engaged.

📊 PwC — teams with high psychological safety are 60% more likely to turn complex problems into growth.

📊 Gallup — when people believe their opinion counts: 27% less turnover, 12% more productivity.

📊 Mckinsey — here’s the rub - only 26% of leaders, one in four, have the skills to cultivate an environment where the team feels safe to speak up.

What you need as a leader is your people saying what they really think, instead of them hesitating and self-censoring because no one wants to look stupid so they don’t ask the questions many of us are intrigued to know the answer to; they don’t ask for help because they worry people will judge them and they don’t challenge the status quo because they prefer not to look like a trouble maker.

Henley Business School challenged this. On day one of my Masters in Coaching and Behavioural Change, Dr. Rebecca Jones told us we'd each conduct our own pioneering research. I chose psychological safety -it taught me exactly how leaders misfire.

70% of leaders overestimate how safe colleagues feel to speak up - to challenge the status quo, ask awkward questions, or discuss mistakes openly. The result: pulled punches, groupthink, weaker decisions, suppressed creativity, and a slow erosion of morale.

Leadership teams misfire when they discuss business-critical dynamics - like engagement - without real insight from colleagues. They see some survey data, sense something's off, and design a fix in a vacuum, without the people who gave that feedback in the room.

For my dissertation, I reviewed sixty years of psychological safety research and ran qualitative interviews to build a diagnostic tool measuring team dynamics around connection and performance - a confidential, anonymous survey colleagues complete in under three minutes.

The real insight comes from combining that data with colleagues' lived experience. That's what reveals the why. Clients across elite sports, consumer goods, professional services, charities, construction, nuclear power and creative agencies tell me the same thing: "We've had conversations we've never had before." The data is the catalyst - not the answer.

Forced change without real insight is wasted effort. Reflecting on why the scores look the way they do, discussing what behaviour change people actually want, and committing to it together — that's what drives real adoption. People don't just want the action. They want to know why.

Don't guess and misfire. Measure, then talk. Spend less time hypothesising, more time empowering your team to drive the change they believe in.