Psychology 1000 Chapter Notes - Chapter 4: Parental Investment, Biological Determinism, Heritability

• School: Western University
• Department: Psychology
• Course: Psychology 1000
• Professor: John Campbell

Document Summary

Women: older (about 3 1/2 years older, symmetrical face (indicative of health, high parental investment. Men: youth & health (reproductive potential, symmetrical face. Cooperation - situations in which one individual helps another and in so doing also gains some advantage. Adaptive advantage clear - groups could accomplish more together than they could alone. When one individual helps another, but in doing so he or she accrues some sort of cost. Kin selection: behaviors that help genetic relatives may be favored by natural selection. Having offspring isn"t the only way to ensure your genes are passed to future generations: help relatives who share some of your genes - produce offspring. Reciprocity hypothesis: a helpful action is repaid at a later date by observers of the helpful individual, ex: giving blood. Small cost to the donor, no obvious gain to the donor, big gains to the recipient. Maybe the donor is repaid by his everyday companions: richard alexander.