Final answer:
Collective behavior in human geography refers to the non-institutionalized activity in which groups engage, driven by shared interests or ideas, in forms like crowds, masses, and public. It's influenced by both expressive and rational elements of group decision-making.
Step-by-step explanation:
The study of spatial interaction in human geography, focusing on group behavior rather than the behavior of individuals, refers to Collective behavior. This type of behavior is characterized by non-institutionalized activity in which several people voluntarily engage. It can come in various forms such as crowds, masses, and public. Some theories, like the emergent-norm perspective, highlight the role of social norms in crowd behavior, whereas others consider the rational and strategic aspects of group decision-making.
Examples of collective behavior include events where large groups come together, driven by shared interests or ideas, such as political rallies, mass protests, or the participation in social movements. Collective behavior is complex, often influenced by both expressive, symbolic elements as well as rational, instrumental components.