When adults urge kids to “play nicely” we often assume their cooperation hinges on the child's personality. But something far more valuable may be at work.

When it comes to helping kids cooperate, having a shared goal to provide structure and focus is more instrumental than personality and social skills, new research shows.

Researchers from the University of Cambridge and the University of Sussex found that children who were not already friends connected far more effectively during play when they were given a shared goal. Simply putting them together with toys and telling them to play did not produce the same cooperative.

Connected communication helps children's ability to negotiate, listen and respond to one another's needs. While many children may play next to one another, that is not the same as truly interacting.

The study's findings draw results from 148 children aged six to eight in five UK schools. The researchers were particularly interested in what they call “connectedness.” These are moments when children actively build on one another's ideas in conversation, rather than playing in tandem and side-by-side and essentially alone.

Each child was first asked to name their three best friends. The researchers then created pairs made up either of friends or of children who did not identify one another as buddies. Next, each pair completed two activities. In the first, they were given a Playmobil treehouse set and invited to play however they wished. In the second, they were handed a drawing of a tree trunk ad asked to work together to turn it into a picture of the treehouse. Because there was only one pad of paper and a limited number of coloring pens, the children had to coordinate their efforts to complete the task.

The sessions were video-recorded. Later, researchers analyzed the conversations for “connected talk” — statements from each child that directly responded to, or built on, what the other child had just said. Each pair received a connectedness score, expressed as a percentage of how often their exchanges were collaborative.

Across the entire group, connected talk rose by about four percentage points during the goal-directed drawing task compared with free play, a statistically significant increase. But when the researchers looked more closely, they found that nearly all of the improvement came from children who were not friends.

Among non-friends, connectedness jumped from 44 percent during free play to 55 percent during the drawing task. Connected talk barely changed among children who were already friends — moving from 48 percent during free play to 50 percent during shared goal activity.

Children who were not already friends connected far more effectively during play when they were given a shared goal like completing a drawing together.

“When I first saw the results, I thought: ‘This doesn't make sense — why would this only happen among non-friends?'” Dr. Emily Goodacre of the Play in Education, Development and Learning (PEDAL) Research Centre at University of Cambridge said in a media release. “The answer is probably that friends have shared experiences and an intuitive understanding of how to play together, but non-friends lack that familiarity and might benefit from being set a goal.”

In other words, close friends may already know how to coordinate their play, sometimes relying on non-verbal cues or shared history. For children who do not have that built-in understanding, however, having a shared, clearly-defined task appears to provide structure that fosters communication.

As the study's authors stress, connected communication matters. It reflects not only teamwork, but also children's ability to negotiate, listen and respond to one another's needs. While many children sit next to one another using the same toy, that is not the same as truly interacting.

Importantly, previous work by the PEDAL team has suggested that connected play is influenced less by individual social ability than by context. This new study strengthens the idea that the structure of the activity, not just the personality of the child, can shape how well children collaborate.

The research reminds us that play is not only about fun; it's about learning how to work, talk and grow together. For teachers organizing classroom groups or parents planning playdates, the takeaway is reassuring. A little direction can go a long way.

The study is published in Infant and Child Development.