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Chapter 6

Chapter 6 Evolutionary Psychology.docx

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PSYC 3420
Irwin Silverman

Chapter 6 evolutionary psychology Short term sexual strategies: o Men would accept 75% of time, more likely if attractive o For women they would if status or emotional side to the sex o For women 24% if attractive; 82% men Theories of mens short term mating: o Adaptive benefits for men of short term mating: Trivers parental investment shows men have more casual ; no investment Reproductive benefits of man are direct- more offspring likelihood More success in more partners than more children per partner o Potential costs of short term mating: 1. Disease 2. Womanizer rep 3. Lack of investment-no success 4. Violence of jealousy 5. Violence due to father or sons 6. Costly divorce Selection favored these o Box 6.1 176 o Adaptive problems men must solve when pursuing short terms: Problem of partner number or variety: Desire for sexual access to large number Relaxation of standards men might impose for short termers Propose minimum time constraints- little time elapse before seeking sex Problem of sexual accessibility: Advantage for ppl who targeted sexually accessible women Adaptations such as preferences as not being prude, inexperiences,conservatme, low in drive, Clothes signaling openness desired, suggest accessibility Problem of identifying which are fertile: Prefer cues of fertility- highest probability of preg during one act Long term mates might be predicted to prefer younger b.c. Of repro value; fertility is now now now Page 1 of 12 Doesnt guarantee 2 preference of selection (r/f) for younger but that we can make hyps n test em Problem of avoiding commitment: Avoid women who demand; strategy of women to lure for long term undesirable Evidence for an evolved short term mating psychology: o Physiological evidence for short term mating: Adaptation in our psychology, anatomy, physiology, and behaviour reflect prior selection Testicle size: Evolve as consequence of sperm competition; selection pressure to more sperm-in number Far greater than of gorillas ; relative to body .018, .4 orang; .079 human males Must have had sex with few men in few days- unlikely unless competition Chimp-.269 3x human men Gorlia 1; human 1.1;baboon 8; bonobo chimp 9; common chimp 13 Variations in sperm insemination: Mens count went up with time since last sex encounter increasingly 100% time together 389 mil; 5% together 712 mill Increases when others might be in the tract; didnt depend on his activity; greater chance when separated o Psychological evidence for short term mating: Desire for a variety of sex partners: Lust-secures the desire for more partners Larger % of men and women in cross cultures study: o Men show desire of more than 1 partner over next month o Norwegian-equality; 2 partners over next yr; men 7 o Norwegian-over next thirty: women 5 ; men 24 Largest sex diff: to wish to have sex with whomever they wanted Page 2 of 12 Men 37 x per wk; woman avg 9x Men wanted more than women in all cases cross culturally Time elapsed before seeking intercourse: 5 yrs both would; men exceeded women in shorter interval One wk- men are positive of consent; women not One hour- men disinclined; women impossible Greater likelihood to consent earlier is adaptive to elapsed time issue Men-greater willingness to engage in sexual intercourse across all conditions compared with women Men lower standards for casual sex; easy access more desirable for short term Lowering of standards in short term mating: Age intell, personality, status to exclude the potential mates from consideration Relaxed standards ensure more eligible players College me
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