Reciprocal altruism

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  • Essentials of Statistics for the Social and Behavioral Sciences distills the overwhelming amount of material covered in introductory statistics courses into a handy, practical resource for students and professionals. This accessible guide covers basic to advanced concepts in a clear, concrete, and readable style. Essentials of Statistics for the Social and Behavioral Sciences guides you to a better understanding of basic concepts of statistical methods. Numerous practical tips are presented for selecting appropriate statistical procedures.

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  • In this important book, Erving Polster - coauthor of the landmark work "Gestalt Therapy Integrated" - greatly expands the therapeutic utility of the concept of self. A Population of Selves offers therapists new ways of thinking about the self, as well as specific procedures to help patients realize a powerful and healthy sense of self: a goal at the very heart of the therapeutic process. In an innovative expansion of therapeutic theory, Polster shows how the human reflex to summarize and animate experiences serves as a natural springboard for the formation of selves.

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  • Two strangers meet far from the reach of organized society . Each must decide quickly whether to attack, or await the action of the other. Together, they are better off choosing restraint and thus opening up possibilities for mutually beneficial intercourse . Desires for both self-protection and possible wealth enhancement, however, impel each of them toward an initial and immediate aggressive move .

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