Bullying is repeated aggressive behavior with a power imbalance, where one person or group intentionally harms another. In Developmental Psychology, it shows up in peer relationships, school settings, and social development.
Bullying in Developmental Psychology is repeated aggression that happens when one child or group has more power than another and uses that power to hurt, exclude, or control. That power can come from size, popularity, age, social status, or access to a group. The harm can be physical, verbal, social, or digital, and the pattern usually lasts longer than a single argument or rude comment.
What makes bullying different from ordinary conflict is the imbalance. Two friends who argue are in a conflict, but bullying usually has one side in a stronger position and one side stuck in a weaker position. That weak position matters because the target may feel unable to stop it, report it, or walk away without losing friendships, status, or safety.
In developmental psychology, bullying is not just about the person doing the hurting. It is also about the social setting around them. Peer groups can reward aggression with attention, laughter, or status, which makes the behavior more likely to continue. A classroom, team, bus line, or online group can become a setting where exclusion and teasing get normalized if nobody interrupts it.
Bullying also includes victimization, which is the experience of being targeted. Repeated victimization can shape how a child sees themselves and other people. Over time, a bullied child may become more withdrawn, wary, or anxious in social situations, especially if the bullying happens in spaces they cannot easily escape, like school hallways or group chats.
Cyberbullying is the digital version of this pattern, and it changes the experience because the harassment can follow a child home. Texts, posts, comments, and messages can make the target feel like there is no break from it. In a developmental context, that matters because peer relationships are supposed to be a place to practice social skills, build trust, and form friendship quality, not a constant source of threat.
Bullying behavior can grow out of family dynamics, peer pressure, and learned social norms. If a child sees aggression modeled as a way to get attention or control others, that pattern can carry into friendships. Developmental psychology looks at how these behaviors are reinforced, how children interpret them, and why some peers become bullies, some become targets, and some become bystanders who either help or stay silent.
Bullying matters in Developmental Psychology because peer relationships are one of the main places where children practice social competence, identity, and emotional regulation. If a peer group rewards cruelty or exclusion, it can distort those developmental tasks instead of supporting them.
It also gives you a way to read real situations more carefully. A child who seems “shy” may actually be avoiding peers after repeated victimization. A child who acts aggressive may be gaining status from the group, not just lashing out randomly. The term helps you look beyond the surface behavior and ask what the social environment is reinforcing.
Bullying connects directly to school climate, friendship quality, and later mental health. When peers are unsafe, kids may participate less, speak less, or form friendships based on fear rather than trust. That can affect confidence, belonging, and the willingness to seek help from adults.
The term also shows how a bystander can change the whole pattern. In a class discussion or case study, it is not enough to label one child as “mean.” You usually need to notice who is supporting the behavior, who is avoiding it, and what the group norms are doing.
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Visual cheatsheet
view galleryvictimization
Victimization is the experience of being targeted, and bullying is one major cause of it in peer groups. In Developmental Psychology, you can use the term to focus on the child on the receiving end, especially when repeated harm starts affecting confidence, behavior, or school participation.
bystander
A bystander is the peer who sees bullying happen and does something, or does nothing. Their reaction can reinforce the bully by laughing or joining in, or reduce harm by getting help, speaking up, or including the target. This makes bullying a group process, not just a two-person interaction.
cyberbullying
Cyberbullying is bullying through phones, apps, games, social media, or messaging. It matters in developmental psychology because peer aggression is no longer limited to school hours, and the target may feel trapped even at home. The online setting can also spread humiliation faster and to more people.
Peer Rejection
Peer rejection and bullying are related, but they are not the same. Peer rejection is more about being left out or disliked by the group, while bullying includes repeated aggression plus a power imbalance. A rejected child may be isolated without being actively attacked, but rejection can make bullying easier to carry out.
A quiz, scenario question, or short essay may ask you to identify bullying in a classroom or peer-group example and explain why it is not just ordinary conflict. Look for three features: repetition, intent to harm, and an imbalance of power. If a prompt mentions teasing that keeps happening, a popular group targeting one student, or harassment through social media, bullying is the better label.
You may also be asked to explain the effects on the target or the role of bystanders. A strong answer connects the behavior to peer relationships, emotional well-being, and school climate instead of treating it like a one-time bad interaction.
Peer conflict is a disagreement between people who have similar power and a back-and-forth exchange. Bullying is different because it is repeated, intentional, and built around an imbalance of power. If both kids can argue, walk away, or push back equally, it is more likely conflict than bullying.
Bullying is repeated aggression with a power imbalance, not just a single rude moment.
In Developmental Psychology, bullying matters because it changes how children experience peer relationships, belonging, and safety.
The social setting matters too, since peer groups, bystanders, and school norms can keep bullying going or help stop it.
Cyberbullying can extend harassment beyond school, which makes the target feel like there is no real break.
When you see bullying in a case, look for repetition, intent, power, and the group response around it.
Bullying is repeated aggressive behavior where one person or group has more power than another and uses it to harm, exclude, or control. In Developmental Psychology, it is studied as part of peer relationships, social development, and school climate. The focus is not just on the act itself, but on how the peer group and environment keep it going.
Peer conflict is usually a back-and-forth disagreement between roughly equal peers. Bullying is one-sided, repeated, and tied to an imbalance of power. That difference matters because the target of bullying may not be able to safely fight back or leave the situation.
A bystander can either reinforce bullying or interrupt it. Laughing, filming, or joining in can reward the behavior, while getting adult help, speaking up, or including the target can reduce harm. In developmental psychology, bystanders are part of the peer system, not just spectators.
Cyberbullying is bullying that happens through digital spaces like texts, social media, and online games. It can be especially stressful because it follows the target outside school and can spread quickly to a wide audience. That makes the harm feel constant instead of limited to one place.