TLDR: Treat candour as a performance system your team can measure and improve. When people speak up about risks and errors, learning compounds, execution sharpens, and results follow. Leaders build that condition on purpose, through repeated everyday behaviour.
Google found that team success depends on how people treat one another
When Google set out to decode its best teams, the surprise was that talent rosters explained very little. The multi-year study known as Project Aristotle identified five dynamics of effective teams, and it ranked psychological safety first, ahead of dependability, structure and clarity, meaning, and impact. The finding reframed a soft-sounding idea as a hard performance variable. Teams did better when members believed they could take an interpersonal risk, ask a question, admit a mistake, or challenge a decision, without being punished for it. That belief shaped how people shared information, and how they shared information shaped what the team could deliver.
I keep returning to this study because it moves the conversation away from personality and toward conditions leaders actually control. You cannot swap your people every quarter. You can change how safe it feels to be honest in the room, and that change is where the performance lives.
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