In 2012, Google launched a research initiative called Project Aristotle to answer a deceptively simple question: what makes some teams great and others mediocre? They studied 180 teams, conducted 200+ interviews, and tested 250 different attributes. The answer surprised nearly everyone involved.
It wasn’t about who was on the team. Not IQ, not seniority, not where people went to school. The most successful teams didn’t have the most talented individuals — they had the right dynamics between them.
That finding echoes across decades of research and across wildly different contexts. From Pixar’s animation studios to the New Zealand All Blacks rugby dynasty to Spotify’s engineering squads, the same patterns keep emerging. Great teams aren’t built by assembling stars. They’re built by creating conditions where ordinary people do extraordinary work together.
Here’s what research and the world’s best teams teach us about those conditions — seven ingredients that show up again and again, whether you’re looking at a rugby squad, an animation studio, or a software team shipping code every week.
1. Trust: The Foundation Everything Else Rests On
The New Zealand All Blacks have a 77% all-time win rate across more than 600 international matches — the most dominant record in professional sports. Their secret isn’t a superior talent pipeline (New Zealand has fewer than 5 million people). It’s a culture built on radical trust and humility.
After every match, senior All Blacks players pick up brooms and clean the locker room. They call it “Sweep the Sheds.” No one is too important for the basics. No one is above the team. That ritual communicates something powerful: we trust each other enough to be vulnerable, to be humble, to put the collective above the individual.
What the research says: Deloitte’s 2025 survey of nearly 1,400 professionals found that high-performing team members report trust at 65% versus just 28% in other teams. It’s not just reliability (“will you do what you said?”) — it’s vulnerability-based trust, the willingness to admit weaknesses and ask for help without embarrassment.
The takeaway: Trust isn’t built through trust falls at off-sites. It’s built through consistent small acts — admitting mistakes, asking for help, giving credit to others. It’s built when leaders go first, showing that vulnerability is safe. The All Blacks prove that trust and high performance aren’t at odds — in fact, the humility embedded in “Sweep the Sheds” is precisely what enables their relentless excellence. When ego leaves the room, collaboration fills the space.
2. Psychological Safety: Permission to Be Honest
At Pixar Animation Studios, every film goes through the Braintrust — a group of directors, writers, and storytellers who gather to give candid feedback on works in progress. The rules are specific: feedback focuses on the project, never the person. Hierarchy is removed. The director maintains full decision-making authority. And candor is non-negotiable.
Ed Catmull, Pixar’s co-founder, described the Braintrust’s purpose as to “push towards excellence and root out mediocrity.” But that only works because people feel psychologically safe enough to be honest. Without safety, candor becomes cruelty or — more commonly — silence.
What the research says: Amy Edmondson’s groundbreaking research at Harvard found that the highest-performing hospital teams actually reported more errors — not because they made more, but because they felt safe talking about them. Google’s Project Aristotle confirmed psychological safety as the single most important factor in team effectiveness. And recent data shows that teams with high psychological safety report 27% higher profitability and 35% faster project completion.
The takeaway: Psychological safety isn’t about being nice or avoiding conflict. It’s about creating an environment where honesty is safe — where people can say “I don’t understand,” “I made a mistake,” or “I disagree” without fear. Pixar’s Braintrust shows that candor and care can coexist — you can be direct about what’s not working while respecting the person doing the work. That distinction is everything. For a deeper guide on building this, see our complete resource on psychological safety at work.
3. Communication: Equal Voices, Not Loud Ones
Researchers at the MIT Human Dynamics Laboratory made a striking discovery: communication patterns alone predict 35% of a team’s performance variation. That’s as significant as all other factors — intelligence, personality, skill — combined.
What distinguishes great teams isn’t how much they communicate, but how: everyone talks and listens in roughly equal amounts. Contributions are short and energetic. People connect directly with each other, not just through the team leader. And members regularly explore outside the group, bringing fresh perspectives back.
A real-world example: Spotify designed their entire organizational structure around communication quality. Their squad model creates small, autonomous teams of 8-12 people with full ownership of their work. Chapters and guilds create cross-cutting connections so information doesn’t get siloed. The structure ensures that no single voice dominates and fresh perspectives continuously flow in.
The takeaway: If your meetings are dominated by one or two voices, your team is underperforming — no matter how smart those voices are. Great leaders don’t just encourage participation; they design structures that make equal contribution the default.
4. Shared Purpose: A Reason Beyond the Paycheck
Katzenbach and Smith’s research across 30 companies found something counterintuitive: companies that emphasize performance goals spawn more real teams than companies that promote “teamwork” itself. Purpose creates teams. Team-building exercises alone don’t.
The All Blacks embody this through their legacy mindset: “Leave the jersey in a better place.” Every player understands they’re temporary custodians of something larger than themselves. That shared purpose — excellence that outlasts any individual — creates a level of commitment that no bonus structure could match.
What the research says: Richard Hackman’s decades of research at Harvard found that a “compelling direction” is one of five conditions that account for up to 80% of a team’s effectiveness. Google’s Project Aristotle identified “meaning” and “impact” as two of their five dynamics. People need to know not just what they’re doing, but why it matters.
The takeaway: Can every person on your team articulate your shared purpose in one sentence? If not, that’s the gap to close first. Purpose isn’t a poster on the wall — it’s an answer to the question “why does our work matter?” that every team member believes. And purpose doesn’t have to be world-changing. A customer support team whose shared purpose is “we make frustrated people feel heard” is just as powerful as a moonshot mission — because it’s real and specific. Understanding what drives your people starts with knowing the real drivers of engagement.
5. Diverse Thinking: The Power of Cognitive Friction
When everyone on a team thinks the same way, decisions feel efficient. They’re also more likely to be wrong. Homogeneous teams are prone to groupthink — settling on familiar solutions without examining alternatives.
McKinsey’s 2023 study of more than 1,000 companies across 23 countries found that organizations in the top quartile for diversity are 39% more likely to outperform financially. Research from Stanford shows diverse teams generate 60% more creative solutions than homogeneous groups. And a study in the Journal of Innovation Management found diverse teams produce 30% more ideas during brainstorming.
A real-world example: Pixar’s Braintrust intentionally includes people with different expertise — directors, writers, editors, story artists — because creative problems need multiple lenses. Netflix builds cross-functional teams that bring engineering, product, design, and content perspectives together for every major decision. The friction isn’t a bug; it’s the feature.
The takeaway: Diversity isn’t just a moral imperative — it’s a performance strategy. But diversity only works when paired with psychological safety. Without it, different perspectives get suppressed rather than leveraged. The goal isn’t just demographic diversity — it’s cognitive diversity: putting people in a room who genuinely think differently about problems, then creating the conditions for those differences to produce better decisions rather than gridlock.
6. Recognition and Celebration: The Glue That Holds Great Teams Together
Here’s what most “what makes a great team” articles miss entirely: great teams don’t just perform — they celebrate. They mark milestones. They acknowledge contributions. They take time to say “we did something meaningful together.”
The research on this is overwhelming. Gallup data shows that high-quality recognition makes employees 45% less likely to leave. Teams engaging in regular celebrations boost performance by up to 25%. And 94% of employees feel valued with weekly recognition, compared to just 37% with annual feedback alone.
Yet only 22% of employees say they receive the right amount of recognition. That’s a massive gap between what the research says works and what most organizations actually do — and a massive opportunity for any team leader willing to close it.
A real-world example: The All Blacks don’t just celebrate winning. They have induction ceremonies, first-cap rituals, and legacy traditions that mark every transition. These aren’t frivolous — they’re infrastructure. They remind people they belong to something larger and that their contribution matters.
The takeaway: Recognition and celebration aren’t soft extras you add after the “real work” is done. They’re what sustains great teams through difficult periods. When people feel seen and valued, they bring more energy, more creativity, and more commitment. Whether it’s a group card for a work anniversary, a team shout-out after a project launch, or a simple “I noticed what you did” — building a culture of recognition is building team resilience.
7. Accountability: Holding Each Other to a Higher Standard
Netflix describes their culture as “Freedom and Responsibility” — giving teams extraordinary autonomy paired with equally extraordinary accountability. Their “informed captain” model means someone owns every decision. Their “context not control” philosophy means leaders set direction, then trust teams to figure out the how. But the implicit bargain is clear: with freedom comes the responsibility to deliver.
This isn’t top-down pressure. The best accountability is mutual — team members holding each other to shared standards because they’ve committed to a shared purpose. Spotify’s squad model reflects the same principle: squads have radical autonomy in choosing their tools and methods, but they own the outcomes completely. There’s no one to blame but yourselves — and that ownership becomes a source of pride, not pressure.
What the research says: Research published in the Journal of Business Ethics found that team accountability — defined as shared expectations of being answerable for common actions — is strongly related to trust, commitment, and long-term team sustainability. Katzenbach and Smith’s research confirmed that peer-based accountability is more powerful than manager-imposed accountability. Teams that hold themselves accountable don’t need external pressure to perform.
The takeaway: Accountability without trust becomes surveillance. Trust without accountability becomes complacency. Great teams have both — and they reinforce each other. The key distinction: accountability in great teams is forward-looking (“how do we do better next time?”) rather than backward-punishing (“whose fault was this?”). If you want to check whether your team has real accountability, skip-level conversations often reveal whether it’s genuine or performative.
Team Health Check: 7 Questions to Ask This Week
Rate each statement from 1 (strongly disagree) to 5 (strongly agree). Be honest — the value is in the conversation this sparks, not the score.
| # | Question |
|---|---|
| 1 | Trust: “I feel comfortable asking for help or admitting mistakes to this team.” |
| 2 | Psychological Safety: “People on this team can disagree openly without negative consequences.” |
| 3 | Communication: “In our meetings, everyone’s voice is heard — not just the loudest or most senior.” |
| 4 | Purpose: “I can clearly articulate why our team’s work matters and how it connects to the bigger picture.” |
| 5 | Diverse Thinking: “We actively seek out different perspectives before making important decisions.” |
| 6 | Recognition: “In the last seven days, someone on this team was appreciated for their contribution.” |
| 7 | Accountability: “We address issues and hold each other to our commitments directly and constructively.” |
How to interpret your score:
- 30-35: Your team has strong foundations. Focus on sustaining what works and deepening it.
- 22-29: Solid base with clear areas for growth. Address the lowest-scoring item first.
- 15-21: Significant gaps exist. Start with items 1 and 2 (trust and safety) — everything else builds on those.
- Below 15: Your team likely operates in a fear-based or siloed pattern. Consider facilitated team conversations or external support.
The most powerful thing you can do with this diagnostic is share it with your team. That act alone — asking “how are we doing as a team?” — signals that you care about the dynamics, not just the deliverables. Use it as a conversation starter in your next team meeting, a retro, or even asynchronously through a simple survey. The numbers matter less than the discussion they spark.
The Thread That Connects All Seven
Look at any great team — in sports, in business, in creative work — and you’ll find these seven elements woven together. Trust enables psychological safety. Safety enables honest communication. Communication surfaces diverse perspectives. Shared purpose gives those perspectives direction. Recognition keeps people energized through the hard parts. And accountability ensures that all of this translates into results.
But here’s what the research consistently shows: these aren’t static qualities you either have or don’t. They’re practices. They require ongoing attention. The All Blacks sweep the sheds every single time. Pixar convenes the Braintrust for every film. Great teams build rituals that reinforce their culture, day after day.
The most overlooked ritual? Celebration. Not the big annual gala — the small, consistent moments that say “what you did mattered” and “we’re in this together.” Team building activities and shared experiences create the social fabric. Recognition and celebration maintain it.
What makes a great team isn’t a secret formula or a set of superstars. It’s a group of people who trust each other enough to be honest, who share a purpose worth committing to, and who take the time to recognize that the journey matters as much as the destination.
Start with one question from the health check above. Discuss it at your next meeting. And notice what happens when you give your team permission to talk about how they work together — not just what they produce.
Because in the end, what makes a great team isn’t complicated. It’s just hard to sustain without intentional effort. The teams that last — the ones that people look back on as career highlights — are the ones where someone cared enough to ask “how are we doing?” and then did something about the answer.