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7 Cards in this Set

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  • Back
Under what conditions does reciprocal altruism evolve?
1. Benefits to other outweigh cost to actor
2. Recognition of group members
3. Long-lived species
4. Stable groups: members aren't constantly changing
5. Social species
reciprocity vs. similar things
mutualism: benefit is not delayed (moving a rock together so you can both get out of a cave)
reciprocity: benefit is delayed
altruism: benefit is not guaranteed
prisoner's dilemma
-2 suspects are arrested for one in a series of crimes
-questioned separately
-confess, cooperate, inform, defect
-lighter sentence for defecting
*single game: best to defect
*iterated game: best to cooperate
-start out cooperating
-cooperate as long as other does
-defect only after other does
-be forgiving
*an ESS (evolutionarily stable strategy)
evolutionarily stable strategy (ESS)
a strategy, which if adopted by most members in a population, cannot be bettered by an alternate strategy
requirements for tit-for-tat
1. recognition of group members
2. memory for past interactions
3. repeated interactions
adaptive function of moral emotions
1. respect for authority
2. thirst for justice
3. evolution of caring