Prosocial behavior refers to the phenomenon of people helping each other with no thought of reward or compensation. You may have thought this didn't exist, but it's been known to happen. Prosocial behaviors are actions or patterns of behavior rather than motivations. The motivation to do charitable acts is called altruism. For example, if a person gives an unmarked box of clothing to a shelter anonymously, the action of giving the box is the prosocial behavior. The person's motivation to give the box would be altruism.