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"She threw sand at me." "He took my toy and wouldn't give it back." "They said they wouldn't play with me." — children returning from preschool or daycare often bring these accounts home, and parents are left wondering how to respond.
Should you call the other child's parent? Ask the teacher to step in? Or trust that children will sort it out themselves?
There is no single right answer, but research on children's peer relationships does provide useful coordinates for thinking through when adult involvement helps and when it gets in the way. This article draws on that work to map the developmental significance of conflicts at around age four and to lay out a framework for deciding when to act and when to hold back.
Conflict Is Part of Friendship, Not Evidence Against It
The starting point is worth stating plainly: conflict between friends is not a sign that the friendship is broken. It is part of what friendship is.
Hartup (1996), in a comprehensive treatment of children's friendships and development, argued that what friends offer — cognitively and socially — is qualitatively different from what non-friends offer [1]. Within friendship, conflict itself and the process of resolving it serve a functional role in the development of social skill [1].
Put differently, "a conflict happened" is less informative than "what happened after the conflict." The resolution process is where the developmental work lives.
What Sibling Conflict Teaches About Peer Conflict
Research on siblings is closely adjacent and worth borrowing here.
Howe and colleagues (2002) distinguished between constructive conflict and destructive conflict in sibling pairs [2]. Constructive conflict involves both parties asserting their position while still working toward a resolution. Pairs who engaged in more constructive conflict used richer internal-state language (words for feelings and desires — "I was sad," "I wanted that") and showed more elaborate pretend play as well [2].
It is not the quantity of conflict that shapes the relationship. It is how the conflict is conducted. The same principle applies to peer relationships.
What Children Gain from Solving Problems Themselves
Ladd (2005), in a landmark synthesis of peer relations research spanning a century, argued that children's experience of solving problems with peers — without adult mediation — is itself what builds social competence [3]. When adults intervene frequently to resolve conflicts, the child finds momentary relief, but the accumulated experience of having solved it myself does not build up. When the same situation arises next time, the skills for handling it without adult support are not there.
Ladd's synthesis also draws attention to a distinction that is easy to miss in the moment: the difference between a child who lacks the social skills to resolve a conflict and a child who has those skills but is not being given the opportunity to use them. Repeated adult intervention addresses the surface outcome but does not help a child build toward independence. In fact, it may communicate — unintentionally — that conflicts are situations adults handle rather than situations children navigate.
Verbeek, Hartup, and Collins (2002) documented children's peacemaking capacities directly: children ages two to seven demonstrate the ability to reconcile and repair relationships on their own after disputes [4]. This capacity was observed consistently across preschool settings in Italy, Russia, Sweden, and the United States — suggesting that children possess internal resources for managing conflict earlier than adults typically assume [4]. The post-conflict behaviors children used — proximity-seeking, offering an object, initiating play — were recognizable across cultural settings, pointing to something that is not taught explicitly but emerges from the social context of shared play.
When Intervention Is Called For
With this foundation in place, the situations that do warrant active adult involvement become clearer.
When physical safety is at risk. Intense physical aggression or situations where a child could be injured require stepping in immediately. Physical aggression generally decreases across the preschool years, but when it appears as a repeating pattern rather than an isolated incident, it should not be dismissed.
When exclusion is systematic and repeated. A temporary "I'm not playing with you today" and a pattern of persistently shutting one child out of a peer group are different phenomena. The latter — what researchers call relational aggression: harm inflicted through social means such as deliberate exclusion, rumor-spreading, or withdrawal of friendship rather than physical force — can have real consequences for the excluded child's sense of belonging and well-being. When exclusion is consistent rather than situational, involving the child's caregiver at the preschool is worth considering.
When the child is in significant distress and cannot see a way forward. "I'm never going to play with them again" said on Tuesday afternoon is often followed by the same two children playing together by Wednesday morning — that is developmentally normal. But if distress is sustained enough to affect sleep, appetite, or willingness to go to preschool, the child's account deserves careful, unhurried listening, and a conversation with their caregiver at the facility may be appropriate.
When Intervention Works Against the Child
Equally important: there are situations in which a parent stepping in removes an experience the child needs.
Disputes over shared resources — "I had that first," "give it back" — are ordinary daily events in preschool life. The sequence of the child asking for the toy, being refused, asking again, and eventually either succeeding or moving on to something else is, in itself, practice in social negotiation. When an adult resolves it immediately, the child may learn that calling in an adult is more efficient than negotiating directly. Before contacting the other child's parent, it is worth first checking whether your child has a sense of what they want to do about it.
There is also a separate risk when the parent's emotional investment in the situation runs ahead of the child's. A conflict between four-year-olds can become a conflict between parents while the four-year-olds have already moved on. Keeping the child's perspective and the adult's perspective in separate registers serves both children.
Keeping a Record
When a child describes a conflict, noting it in a log — a tool like Memori works well for this — makes patterns visible over time. "Happens more on certain days," "tends to involve a specific situation," "same peer involved repeatedly or not" are all contextual details that are easy to lose without a record. If the situation eventually warrants a conversation with a teacher or other professional, a written log provides objective material — something more reliable than an emotionally colored memory reconstructed weeks later.
Summary
Conflict in preschool friendships is developmentally expected, and the experience of resolving it contributes directly to social competence [1,3]. A conflict having occurred is not evidence of a relationship problem — in many cases it is evidence that the relationship is real.
The clearest grounds for adult involvement are: physical safety is at risk; exclusion is systematic and repeated; the child is experiencing persistent distress that they cannot begin to navigate on their own. The clearest grounds for holding back are: the situation falls within the ordinary range of resource disputes; the child has enough of their own perspective to try; the adult's concern has overtaken the child's.
Children have the capacity to repair conflicts on their own earlier than most adults expect [4]. Trusting that capacity, and intervening only when the situation genuinely calls for it, is what supports social development over the long run.
References
- Hartup WW. The company they keep: friendships and their developmental significance. Child Dev. 1996;67(1):1–13. doi:10.2307/1131681.
- Howe N, Rinaldi CM, Jennings M, Petrakos H. "No! The lambs can stay out because they got cosies": constructive and destructive sibling conflict, pretend play, and social understanding. Child Dev. 2002;73(5):1460–1473. doi:10.1111/1467-8624.00483. PMID: 12361312.
- Ladd GW. Children's Peer Relations and Social Competence: A Century of Progress. New Haven: Yale University Press; 2005.
- Verbeek P, Hartup WW, Collins WA. Conflict and cooperation in the peer context. In: von Hofsten C, Bäckman L, eds. Psychology at the Turn of the Millennium. Vol. 2. Social, Developmental, and Clinical Perspectives. East Sussex: Psychology Press; 2002:211–238.