What psychological safety is (and isn't)
Step 1 / 3·The surprise from Project Aristotle
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Learning objectives — after this module you will:
- Define psychological safety and separate it from permissiveness
- Understand why it's the top factor in effective teams
- Recognise the signs a team lacks it
The surprise from Project Aristotle
Understand why this topic matters.
Google ran a large internal study called Project Aristotle to answer one question: what makes a team effective? They expected the answer to be team composition — assembling the strongest individuals.
The finding surprised them: WHO is on the team mattered less than HOW the team worked together. And top of the list was PSYCHOLOGICAL SAFETY — the sense that you can voice an opinion, admit a mistake or ask a question without being punished or humiliated.
Why it's the foundation, not just another factor
The other factors DEPEND on it. Without safety, nobody says roles are unclear, nobody flags that the plan has a problem, nobody admits they're struggling. Everything stays hidden until it's too late.
Key takeaway: Psychological safety is the foundation of team effectiveness — the other factors depend on it.