Elevating Performance with Peer-to-Peer Feedback
👋🏻 Hello growth seekers,
When Julia Rozovsky joined Google's People Analytics group in 2012, she brought an unresolved question from business school with her. At Yale she had belonged to two study groups made up of equally bright, equally likeable people, yet one energised her while the other left her guarded. Same raw talent, opposite outcomes. Assigned to an internal research effort named Project Aristotle, she spent two years examining 180 teams, running more than 200 interviews and weighing over 250 team attributes to understand the gap. Her conclusion reframed how companies think about performance: what matters most is not who sits on a team, but how those people treat one another when they speak.
🔍 The signal hidden in plain sight
For months the data refused to cooperate. Strong performers were scattered across thriving and struggling teams alike, and no tidy mix of seniority, personality or skill reliably predicted success. The breakthrough came when the group stopped asking who and started asking how. One factor rose above the rest: psychological safety, the shared sense that you can float an idea, admit a mistake or challenge a colleague without being made to feel smaller for it. Crucially, the effect did not depend on people being naturally agreeable. It depended on how the team had learned to respond when someone took a risk. In Google's own analysis, teams high in this quality consistently outperformed the others on almost every measure that mattered. The takeaway for any organisation is blunt: talent sitting in silence produces very little, and it is the freedom to be genuine with one another that turns a collection of individuals into a team.
🤝 Feedback that runs sideways
Most feedback machinery is built vertically, flowing down from manager to report once or twice a year. Rozovsky's findings point somewhere more powerful and far more frequent: the everyday, sideways exchange between peers. When colleagues feel accepted rather than judged, they can receive a difficult observation and treat it as useful information rather than as a personal attack. That acceptance is not softness or low standards. It is the precise condition that lets people lower their defences long enough to actually absorb the input. A peer who offers “here is what I noticed” and is met with curiosity instead of self-protection has just made the entire team a little sharper. Multiply that across dozens of small moments each week, and you have a performance engine that no annual review cycle could ever replicate. This is the quiet mechanics of high performance: not a dramatic intervention, but a steady stream of small, honest corrections that never let a problem grow large.
📈 Turning candour into capability
Safety is the starting line, not the finish. The teams that pulled ahead used their candour to keep improving: questioning their own methods, surfacing problems while they were still small, and helping each member grow toward their fullest contribution. Leaders played a quiet but decisive role, shaping norms rather than dictating answers. They invited dissent, responded well when someone spoke up, and treated feedback as a shared responsibility rather than a manager's privilege. In practice this looked less like relentless positivity and more like trust: the confidence that an honest word would be received as help rather than as a verdict.
There is a human dimension underneath the metrics. People who are trusted to speak honestly tend to bring more of themselves to the work, stretch further and stay longer. Performance is rarely unlocked by hiring one more brilliant individual; it is built, week by week, in the way people choose to talk to each other. Elevating your team may have less to do with changing who is in the room, and more to do with changing how safe it feels to be honest once they are there..
Practical tools
In this "Practical Tools" section, we've put together a set of resources to support your personal growth journey. For those who want to explore deeper and refine their leadership, these tools ar intention. Here, it's all about taking meaningful steps towards personal betterment. Let's begin!
🧵 Trade observations, not verdicts: set a simple peer ritual: each teammate shares one thing a colleague did that helped and one thing that could be sharper next time, framed as “what I noticed” rather than “what you got wrong.” Naming behaviour instead of character keeps the exchange safe enough to be heard, and turns feedback into a normal weekly habit rather than a rare, tense event.
🔔 Ask for the pull, not just the push: the most useful feedback is often the kind you request. Instead of waiting to be evaluated, ask a peer something specific: “What is one thing I could do to make our next handoff smoother?” A narrow ask is easier to answer honestly, and it signals that you see input as fuel rather than threat, which quietly gives everyone else permission to do the same.
🗝 Build the norm before you need it: teams rarely become candid by accident. Agree out loud on how you will handle disagreement, admit mistakes and respond when someone raises a concern. When a leader thanks the person who challenges them, others notice, and the safety to speak spreads faster than any policy. Norms, not personalities, are what make honesty repeatable.
Food For Thought
Welcome to the "Food for Thought" section, your gateway to a curated selection of resources that will nourish your curiosity and inspire your creative journey. In this corner of Growth Republic, we bring a collection of insightful resources that you can look for on the web, from thought-provoking podcasts or books, to illuminating online articles that can expand your horizons and deepen your understanding of the topics we explore. Consider it your intellectual pantry, stocked with ingredients to feed your mind, and ignite your creativity. Dive into these resources and let the feast of knowledge begin.
📖 Book: Thanks for the Feedback by Douglas Stone and Sheila Heen. A practical guide to the harder half of the exchange, receiving feedback well, with tools to stay curious when input stings.
✍ Article: What Google Learned From Its Quest to Build the Perfect Team by Charles Duhigg, The New York Times Magazine. The definitive long read on Project Aristotle and why safety beats star power.
🎥 Talk: Building a Psychologically Safe Workplace by Amy Edmondson, TEDxHGSE. A twelve-minute case for why people stay silent at work, and how leaders can make it safe to speak up.
Quote Of The Week
«Who is on a team matters less than how the team members interact, structure their work, and view their contributions.» - Julia Rozovsky
About the Author
Hi, I am Cesare Zavalloni. I am a Certified Executive Coach by IMD business school and Associated Certified Coach (ACC), member of International Coaching Federation (ICF). I bring more than 20+ years of experience as corporate executive in Fortune 100 companies and as outdoor adventurer. My purpose is to guide, encourage and inspire young professionals and executives like you to see your authentic leadership nature and the new possibilities this realization creates.
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