Psychological Safety: An Introduction and Background

Introduction

In recent decades, psychological safety has emerged as one of the most talked-about (and often misunderstood), concepts in the world of work. At its heart, it’s about this question:

“Is it safe for me to be myself here and share my real thoughts, ideas and ideas?”

The answer to that question shapes everything: whether people ask questions, raise concerns, offer ideas, admit mistakes, or tell the truth when it’s hard.

When psychological safety is low, people withhold. When it’s high, people contribute and share their genuine thoughts. It really is that simple, and that difficult.

What Is Psychological Safety?

Psychological safety is defined as:

“A shared belief held by members of a team that the team is safe for interpersonal risk-taking.” — Amy Edmondson, Harvard Business School

It means team members feel confident that they can:

• Speak up with ideas or concerns
• Ask questions or admit uncertainty
• Own up to mistakes
• Challenge the status quo
• Be themselves, without fear of ridicule, rejection, or penalty

Crucially, it’s about how the environment makes people feel, not how open a leader thinks they are. We’ve worked with many leaders who genuinely believe they’re approachable, only to discover their teams experience them very differently.

The Origins of Psychological Safety

The term first appeared in the 1960s, but Amy Edmondson’s research in the late 1990s gave it real traction. She studied healthcare teams and found a surprising result:

Teams with higher error rates had better performance. Why? Because they were more willing to report and discuss mistakes.

Her conclusion: psychological safety was the missing variable that explained team learning and effectiveness.

Since then, psychological safety has been widely studied and applied across industries, especially in complex or fast-changing environments.

Project Aristotle: Google’s Validation

In 2012, Google launched Project Aristotle, a major internal research initiative to understand what makes great teams. The findings were clear:

The number one predictor of team success? Psychological safety.

More than technical skills, personality types, or leadership styles, it was the ability to take interpersonal risks, without fear, that differentiated high-performing teams.

This confirmed what many people already knew intuitively: people do their best work when they feel safe to contribute fully.

Why Psychological Safety Matters

Psychological safety is not about being comfortable all the time. It’s about feeling safe to be uncomfortable, to have hard conversations, to stretch, to grow.

When psychological safety is high:

• Teams innovate more often and take smarter risks
• Feedback and accountability are stronger
• Conflicts are more constructive
• People learn faster and adapt more easily
• Engagement and retention improve

Without it, even the most talented teams stagnate, play safe, or implode under pressure. In our experience, a lack of psychological safety is one of the most common root causes when teams are underperforming. Unfortunately, it’s often been one of the last thing leaders think to examine.

Misconceptions About Psychological Safety

Psychological safety is not about being nice, avoiding challenge, or removing standards.

Psychological safety is entirely compatible with:

• High performance expectations
• Honest feedback
• Productive conflict
• Stretch goals and accountability

The difference is how people feel when those things happen. In safe teams, challenge is experienced as developmental, not dangerous. If your team can’t disagree openly without someone shutting down or getting defensive, that’s worth paying attention to.

We’ve seen teams where people describe the culture as “lovely” and “supportive” but nobody ever challenges anything (which isn’t really psychological safety at all). And we’ve seen teams that argue passionately but trust each other completely. The second group tends to produce far better work.

Building a Psychologically Safe Team

Psychological safety doesn’t happen by accident. Leaders play a huge role in creating it, through behaviours like:

• Admitting fallibility – Saying, “I might be wrong. What do you think?”
• Asking open questions – Creating space for input, not just agreement
• Responding with curiosity – Especially when feedback is difficult
• Acknowledging effort – Valuing contribution, not just results
• Modelling inclusive behaviours – Ensuring every voice is heard

But it’s not just about leaders. Teams build psychological safety together, through shared norms and mutual care. Building and maintaining psychological safety takes intention and sustained effort. One offsite workshop won’t do it (sorry). It’s built in the small, daily moments where someone takes a risk and the team responds well.

Learning More

To go deeper, explore these resources on people-shift.com:

• The Five Dysfunctions of a Team – Lencioni’s framework for effective teams
• Trust, Social Threats and the SCARF Model
• Reducing Social Threats in Your Team
• Social Pain – The impacts of social rejection, discomfort and loss
• Giving Feedback Well: Ways To Get Better At Feedback

The People Shift View

Psych safety is right up there with our favourite tools and concepts for leaders and managers. We think it’s perhaps the most important things that teams should explore when looking to improve their performance and culture. It’s also a great concept for leaders to explore when considering how to modify their own behaviours.

Unfortunately, changing the level of psych safety individuals in a team can be hard. Doing so often requires some genuine change from leaders and managers, which is hard to achieve. Psych safety also sort of goes against a lot of “hard charging” or “tough” approaches to leadership. We think it’s great, but it’s definitely hard to achieve and many people who get to senior roles perhaps aren’t the type of folks to whom the behaviours required to create psych safety would come naturally.