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Social exchange theory is a social psychological and sociological perspective that explains social change and stability as a process of negotiated exchanges between parties. Social exchange theory posits that human relationships are formed by the use of a subjective cost-benefit analysis and the comparison of alternatives. The theory has roots in economics, psychology and sociology. Social exchange theory features many of the main assumptions found in rational choice theory and structuralism. It is also used quite frequently in the business world to imply a two-sided, mutually contingent and rewarding process involving transactions or simply exchange. ==History== Social exchange theory was introduced in 1958 by the sociologist George Homans with the publication of his work "Social Behavior as Exchange".〔Karen S. Cook and Erick R. W.Rice. Department of Sociology, Stanford University, Stanford California 94305. Handbook of Sociological Theory, edited by Jonathan H. Turner. kluwer Academic/ Plenum Publishers, New York.〕 He defined social exchange as the exchange of activity, tangible or intangible, and more or less rewarding or costly, between at least two persons. After Homans founded the theory, other theorists continued to write about it, particularly Peter M. Blau and Richard M. Emerson, who in addition to Homans are generally thought of as the major developers of the exchange perspective within sociology.〔 Homans' work emphasized the individual behavior of actors in interaction with one another. Although there are various modes of exchange, Homans centered his studies on dyadic exchange. John Thibaut and Harold Kelley are recognized for focusing their studies within the theory on the psychological concepts, the dyad and small group. Lévi-Strauss is recognized for contributing to the emergence of this theoretical perspective from his work on anthropology focused on systems of generalized exchange, such as kinship systems and gift exchange.〔 Homans summarizes the system in three propositions: success, stimulus, and deprivation–satiation proposition.〔 #Success proposition: When one finds they are rewarded for their actions, they tend to repeat the action. #Stimulus proposition: The more often a particular stimulus has resulted in a reward in the past, the more likely it is that a person will respond to it. #Deprivation–satiation proposition: The more often in the recent past a person has received a particular reward, the less valuable any further unit of that reward becomes. Peter Blau focused his early writings on social exchange theory more towards the economic and utilitarian perspective, whereas Homans focused on reinforcement principles which presuppose individuals base their next social move on past experiences. Blau's utilitarian focus encouraged the theorist to look forward, as in what they anticipated the reward would be in regards to their next social interaction.〔 Blau felt that if individuals focused too much on the psychological concepts within the theory, they would refrain from learning the developing aspects of social exchange.〔 Blau emphasized technical economic analysis whereas Homans concentrated more on the psychology of instrumental behavior.〔 Richard Emerson's early work on the theory intertwined with both Homans and Blau's ideas. Homan believed that social exchange theory was based on reinforcement principles. According to Emerson, Exchange is not a theory, but a framework from which other theories can converge and be compared to structural functionalism.〔 Emerson's perspective was similar to Blau's since they both focused on the relationship power had with the exchange process.〔 Emerson says that social exchange theory is an approach in sociology that is described for simplicity as an economic analysis of noneconomic social situations.〔 Exchange theory brings a quasi-economic form of analysis into those situations.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「social exchange theory」の詳細全文を読む スポンサード リンク
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