Understanding Pro-social Behaviour: Definitions and Examples

When a stranger stops to help you pick up dropped groceries, when a colleague stays late to help you meet a deadline, or when a child shares their snack with a friend who forgot lunch – these small, everyday moments are more than just acts of kindness. They are examples of pro-social behaviour, a concept that sits at the heart of how human societies function and thrive. But what exactly does this term mean, how do psychologists define it, and why does it matter across multiple fields of study? Let’s break it down.

What is pro-social behaviour? 🔗

Pro-social behaviour refers to any voluntary action intended to benefit another person or group of people. Staub (1979) defined it as voluntary behaviour intended to benefit another person, with the word “voluntary” being the critical distinction – it underscores that the action comes from the actor’s own spontaneous initiative, not from any professional role or obligation. A nurse administering medication or a doctor performing surgery is fulfilling a contracted duty; that is not pro-social behaviour in the psychological sense. Pro-social behaviour happens outside such formal roles.

Building on Staub’s foundation, Bierhoff (2002) outlined the core forms this behaviour takes: helping, sharing, giving, and comforting. These four categories capture a broad spectrum of human kindness – from lending a hand with a heavy box to sitting with a grieving friend. Meanwhile, Aronson, Wilson, and Akert (2004) offered a concise and widely used definition: pro-social behaviour is any act performed with the goal of benefiting another person.

According to Eisenberg (2003), pro-social behaviour refers to positive actions that are intentionally and voluntarily directed toward enhancing others’ well-being, with the actor’s underlying motive left unspecified. This last point is important – pro-social behaviour does not require pure selflessness to count. What matters is that the action genuinely benefits others, regardless of whether the helper also gains something in return.

Pro-social behaviour vs. helping vs. altruism 🔗

These three terms are closely related but not interchangeable, and psychologists are careful to distinguish between them.

Helping is the broadest category. It includes any act that benefits someone else, even when it is part of a paid role or professional duty – like a customer service representative assisting a client. Pro-social behaviour narrows this down by excluding all paid activities in the service sector. It is voluntary, spontaneous, and occurs outside of contractual obligations.

Altruism is a further subset. While pro-social behaviour is largely defined by its positive consequences, altruism has more to do with motivation – specifically, the intrinsic desire to help others without any expectation of personal gain. Volunteering at a food bank is a pro-social act; the underlying desire to help people in need, with no expectation of reward, is altruism. Not all pro-social behaviour is altruistic – someone might donate to charity partly to improve their social reputation – but all altruism is pro-social.

Psychologists use this layered framework to analyse not just what people do, but why they do it, which has significant implications for understanding human motivation and designing social programmes.

Key examples of pro-social behaviour 🔗

Pro-social behaviour shows up in an enormous range of everyday situations. These actions include sharing, donating, volunteering, comforting others, helping, and even defending or rescuing people in danger. Some are planned and deliberate; others are spontaneous responses to immediate need. Here are the core categories, with concrete examples:

Helping 🔗

This is the most direct form of pro-social behaviour. It involves offering practical assistance – giving someone directions when they appear lost, helping a classmate understand a difficult concept, or assisting an elderly neighbour with carrying their shopping. What makes it pro-social (rather than merely “helping” in the broad sense) is that it is freely chosen, not part of a job description.

Sharing 🔗

Sharing involves distributing resources – whether food, time, or information – with others who need them. A child offering half their lunch to a friend who forgot theirs, or a colleague passing on a useful document, are both examples. Researchers and child psychologists commonly use acts of sharing to track emotional development, as the willingness to give up personal resources for others reflects growing empathy and social awareness.

Giving and donating 🔗

Giving encompasses charitable donations, gifting goods to those in need, or contributing time and skills to a cause. Donating money to a charity, giving clothes to a shelter, or contributing food to a food drive are all clear examples. These acts can be motivated by genuine concern for others, a sense of civic duty, or even social incentives – and all count as pro-social under the psychological definition.

Comforting 🔗

Emotional support is a quieter but equally important form of pro-social behaviour. Sitting with a friend who is upset, listening without judgement, or simply acknowledging someone’s distress are all acts that benefit another’s emotional well-being. This category is particularly significant in mental health contexts, where social support is known to buffer the effects of stress and adversity.

Volunteering 🔗

Volunteering is one of the most recognised and studied pro-social behaviours. It involves giving time and effort – without pay – to benefit others or a community. Research has shown that helping others can produce feel-good neurotransmitters such as oxytocin, and that volunteering and giving can become intrinsically rewarding over time. This neurological reinforcement helps explain why regular volunteers often describe their work as fulfilling rather than merely obligatory.

Instrumental and informational help 🔗

This includes practical problem-solving: explaining how something works, providing a resource, or stepping in to resolve a difficulty. Teaching a sibling how to use a new device, helping a colleague navigate a software problem, or giving someone accurate directions all fall under this type. The goal is to help another person reach an outcome they could not easily achieve on their own.

Why is the “voluntary” nature so important? 🔗

The emphasis on voluntariness in definitions of pro-social behaviour is not a minor technical detail – it is conceptually central. Pro-social behaviours are motivated by altruism, where individuals show empathy and concern for the well-being of others, sometimes at personal risk or cost. When a behaviour is freely chosen – when nobody is paying you, supervising you, or requiring it of you – its social and moral significance shifts. It signals genuine concern for others, social trust, and community cohesion.

This is why the boundary between professional help and pro-social behaviour matters to researchers. A doctor treating a patient is fulfilling a professional and contractual obligation. But that same doctor who stops to assist someone who collapses on the street, on their day off and without any expectation of compensation, is acting pro-socially. The behaviour looks similar, but its psychological nature is fundamentally different.

Pro-social behaviour across disciplines 🔗

One of the most interesting aspects of pro-social behaviour as a concept is that it does not belong to psychology alone. It is genuinely cross-disciplinary.

In psychology, researchers study its developmental origins (how and when it appears in children), its biological underpinnings (the role of empathy, neurotransmitters, and personality traits), and its situational determinants (why people help in some contexts but not others).

In sociology, pro-social behaviour is examined at the group and community level. According to Twenge et al. (2007), pro-social behaviour is vital to the social system because it helps individuals conform with social norms, identify as part of a group, and maintain the group’s cohesion over time. Societies depend on pro-social behaviour to function – from informal neighbourly support to organised civic participation.

In economics, pro-social behaviour presents a genuine puzzle. Standard economic models assume self-interest as the default human motivation. Yet experimental research consistently shows that people worldwide are motivated by concerns about fairness and a desire to benefit others, even when it comes at a personal cost. Behavioural economists use tools like the Dictator Game and the Ultimatum Game to measure how much individuals are willing to give to strangers, and findings regularly challenge purely self-interested models of human decision-making.

This interdisciplinary reach is part of why the study of pro-social behaviour has grown significantly since the 1970s, when the concept first entered mainstream social science. Today, it informs fields as varied as public health, education policy, organisational behaviour, and international development.

Is motivation relevant to the definition? 🔗

One of the ongoing debates in this field is whether the why behind a pro-social act should influence how we classify it. If someone volunteers at a soup kitchen mainly to impress a potential employer, is that truly pro-social? Most psychological definitions say yes – pro-social behaviour is any action that benefits other people, regardless of the motive or how the person benefits from the action.

This broad definition is deliberate. It prevents researchers from having to make impossible judgements about internal states, which are often mixed and difficult to isolate. More practically, it acknowledges a real-world truth: most pro-social acts involve a blend of motivations. People help partly out of empathy, partly out of habit, partly for social approval, and sometimes because it simply feels good. What matters for society is that the behaviour happens and that others benefit from it.

That said, motivation does become important when distinguishing pro-social behaviour from its subset, altruism – where the primary driver is concern for others, with no expected personal gain.

Pro-social behaviour and social well-being 🔗

The case for understanding pro-social behaviour goes beyond academic curiosity. Promoting pro-social behaviours in educational contexts serves as a means of promoting social harmony and good citizenship, and can reduce antisocial behaviours such as bullying and aggression. At the community level, societies with higher rates of pro-social activity tend to show greater trust, lower conflict, and stronger support networks.

At the individual level, the benefits are equally compelling. Engaging in an average of one to two acts of pro-social behaviour may buffer against the negative effects of stress and support overall mental health. Helping others, it turns out, is good for the helper too.

What do you think? If pro-social behaviour can be motivated by self-interest – like helping others to feel good or gain social approval – does it still count as genuinely “pro-social”? And where do you draw the line between a professional duty and a truly voluntary act of kindness?

References

1. https://positivepsychology.com/prosocial-behavior/
2. https://pmc.ncbi.nlm.nih.gov/articles/PMC3766763/
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5. https://epdf.pub/prosocial-behaviour.html
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