When 11-year-old Lila quietly ate her lunch alone in the corner of her Montreal classroom, she wasn’t necessarily invisible—just overlooked. Across four elementary schools in the city, 252 fifth- and sixth-graders like Lila helped researchers uncover a subtle but powerful truth about friendship: not all best friends are equal when it comes to breaking the cycle of isolation. A new study from Concordia University reveals that having a well-liked best friend can significantly reduce the chances of being excluded by peers, but it does little to ease the quiet pull of social withdrawal. The findings, published in Child Development, highlight how the social capital of a friend—popularity, acceptance, trust—can act as a kind of social lifeline for children on the margins.
The research, led by Melissa Commisso, now a resident at the Montreal General Hospital, tracked students over eight weeks, asking them to name their closest friends and identify peers who were either withdrawn or excluded. The distinction matters. Withdrawn children choose solitude, often due to shyness or self-consciousness, while excluded children are actively left out by their peers. The data showed that social withdrawal remained largely unchanged over time, regardless of friendship status—suggesting it’s rooted more in internal traits than external connections. But exclusion told a different story. Children who had a mutual best friend ranked highly by classmates were far less likely to stay on the outside. Their friend’s popularity, in effect, opened doors.
"Having a well-accepted friend can protect children from experiencing sustained exclusion across time," Commisso says. That protection is critical: long-term exclusion is linked to depression, anxiety, low self-esteem, and even academic struggles. Yet the study also found a sobering flip side—when isolated children befriend others who are also low in social standing, the bond may offer emotional comfort but does little to shift their group status. The friendship becomes a quiet refuge, not a bridge.
Co-author William Bukowski, a psychology professor at Concordia, emphasizes the value of peer insight: "We use the peer group to tell us what the children in the classes are like." This method allowed the team to move beyond assumptions and see real social dynamics in motion. The results suggest that one-size-fits-all approaches to social isolation miss the mark. For excluded kids, classroom interventions that promote inclusion—like group activities that disrupt cliques—could make a difference. For withdrawn children, support may need to come from within, through therapies that help them reframe anxious thoughts or build self-confidence.
As schools look for ways to foster belonging, this study offers a clear message: friendship matters, but so does who your friend is. And in the intricate world of a schoolyard, a well-connected best friend might just be the most powerful ally a child can have.