What psychologist would be concerned with how people are influenced by their surroundings?

A psychologist concerned with how people are influenced by their surroundings is often a social psychologist. Social psychologists study the impact of social contexts, environments, and group dynamics on individual behavior and attitudes. They explore how factors such as culture, social norms, and social interactions shape perceptions and actions. Their research helps to understand phenomena such as conformity, persuasion, and group behavior.