What is the definition of a group in social psychology?

In social psychology, a group is defined as two or more individuals who interact with each other and influence one another. This definition emphasizes the relational aspect of a group, highlighting that it is not merely a collection of individuals but rather a dynamic interaction where behaviors, attitudes, and sentiments can be shared and shaped by social interactions. Interaction is a key component, as it signifies that members of a group do not exist in isolation; their actions and perceptions are interconnected, which can lead to a variety of outcomes, such as conformity, collaboration, or conflict.

This definition sets apart an actual group from other forms of aggregation, such as a mere collection of individuals without interaction or influence, which would not meet the criteria of a social group. Additionally, groups are not necessarily formal organizations with specific roles, nor can they be defined solely by physical proximity, as these aspects do not capture the essence of relational dynamics central to group psychology.