Leadership and People Management: Foundations to Practice · Building High-Performing Teams
Google's Project Aristotle and Psychological Safety
A multi-year internal research effort at Google set out to find the specific ingredients of an effective team, expecting to find that team composition mattered most, and instead found something genuinely counterintuitive about how teams work together.
Project Aristotle, an internal Google People Analytics research initiative beginning in 2012 and running roughly two years, analyzed 180 teams and more than 250 different team attributes, initially hypothesizing that factors like team composition, individual talent, seniority, and personality mix would predict effectiveness [4].
Key Takeaways
- Project Aristotle, a Google research initiative beginning in 2012, analyzed 180 teams and found composition factors like intelligence and personality mix did not predict effectiveness.
- Psychological safety, first conceptualized by Amy Edmondson, was found to be the strongest predictor of team effectiveness by a clear margin.
- Four additional dynamics also mattered: dependability, structure and clarity, meaning, and impact, with psychological safety foundational to the rest.
- The research has genuine limitations: it was observational rather than establishing clear causation, and its population was a specific, relatively narrow corporate context.