A gesture that means agreement in one country signals insult in another. Cross-cultural psychology examines how culture shapes psychological processes and how those processes in turn influence culture.

Researchers compare cognition, emotion, self-concept, moral reasoning, and social behavior across societies. They distinguish cultural universals from culture-specific patterns and test whether psychological theories developed in Western samples hold elsewhere. Methods include carefully matched comparisons, ethnographic observation, and increasingly large multi-country surveys.

Findings have revised assumptions about independence versus interdependence, the expression of emotion, and the development of theory of mind. The field also informs applied work in global organizations, immigration, and international education. Cross-cultural psychology insists that mind cannot be fully understood by studying only one cultural setting.

What feels natural in one community can look strange or even pathological in another.