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interactionism

n. (context sociology English) The branch of sociology that studies interaction between individuals or groups

Wikipedia
Interactionism

In sociology, interactionism is a theoretical perspective that derives social processes (such as conflict, cooperation, identity formation) from human interaction. It is the study of how individuals act within society. Interactionist theory has grown in the latter half of the twentieth century and has become one of the dominant sociological perspectives in the world today. George Herbert Mead, as an advocate of pragmatism and the subjectivity of social reality is considered a leader in the development of interactionism. Herbert Blumer expanded on Mead's work and coined the term "symbolic interactionism".

Interactionism (philosophy of mind)

Interactionism is the theory in the philosophy of mind which holds that, matter and mind being distinct and independent, they exert causal effects on one another. As such, it is a type of dualism. It can be distinguished from competing dualist theories of epiphenomenalism (which admits causation, but views it as unidirectional rather than bidirectional), pre-established harmony, and occasionalism (which both deny causation, while seeking to explain the appearance of causation by other means).