PSYC 3100 Lecture Notes - Lecture 20: Homicide, Sexual Selection
6 Apr 2015
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Document Summary
When central authorities are lacking (as in eea), a reputation for violence can deter potential exploiters. Recall that in many species (including humans) there is greater varience in male than female reproductive success. Most humans societies have effective genetic polygyny due to. Results: greater vvarience in male rs than in female rs (effective polygyny) Lifetime reproduction for birth cohorts of 100 individuals of each sex (n. hiowell 1979) Risky behavior: of options with equal expected payoff, the riskier behavior is the one with greater varience in outcome. If individuals are likely to survive reproduce without taking risks (males more likely to die childless) If risk is unsuccessful, risk-taker loses what it would have gotten without taking the risk. If they are unlikely to survive reprooduce without taking risks. If risk is unsuccessful, nothing is lost because the risk-taker was unlikely to survive produce anyway. Men commit way more same-sex homicides than do women.
