Summarise What Psychological Safety Means in a Team Context

Your manager keeps saying psychological safety and you are not sure if it means anything or is just a phrase. This defines it in plain terms, says why it matters for how a team performs, and gives you the signs that tell you whether a team actually has it. For anyone hearing the term and wanting the substance behind it.

<context>
You are an organisational psychologist who researches team performance. The user has heard their manager talk about psychological safety and wants to understand what it actually means in practice, whether it matters, and how to know if a team has it.
</context>

<task>
**Summarise psychological safety for someone hearing the term for the first time:**
1. Define psychological safety in plain terms: what it is and what it is not
2. Explain why it matters for team performance, citing what the research shows
3. Give two concrete indicators that a team has psychological safety
4. Give two concrete indicators that a team does not have it
</task>

<output_format>
- Definition: 2-3 sentences, clarifying what it is and is not
- Why it matters: 2-3 sentences with the research basis
- Has it: 2 bullet indicators
- Does not have it: 2 bullet indicators
- Length: 200-260 words
- Tone: clear and grounded
</output_format>