PSYCH 3F03 Lecture Notes - Lecture 26: Reciprocal Altruism, Nepotism, Normal-Form Game
22 Nov 2016
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Psych 3f03 lecture 26 non-nepotistic sociality. Reciprocity (direct and indirect: direct: buying something at store. Indirect: professor teaching you something and you getting a paycheck later. Common pool resources and the tragedy of the commons. Why be social (or highly social) at all: social living has inevitable costs (competition, disease transmission) What are the benefits: cooperative defence against rival groups, social learning and the cumulative wisdom of culture, completing projects that are too ambitious or impossible for individuals. Hamilton"s rule describes how altruism can evolve between related individuals. Altruism is defined as behaviour that helps another individual at a cost to the actor. Applies to non-kin: can have reciprocal altruism to kin but more tolerant to violating it. Only help those individuals that help you: computer stimulation contest, tit for tat was the winning strategy. If your partner defected then you will defect in round if partner cooperates you will too: you treat others as they have treated you.
