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Lec 8 food aversion

food aversions and selection EPMs

food aversions disgust not informed by experience (eating once dangerous)
disease avoidance hypothesis of innate disgust a food's tendency to evoke disgust correlates with its microbial danger
across culture disgusting foods feces, wounds, vomit (all carry microbial load)
women more easily disgusted than men (pregnancy, babies, lower mass-higher risk)
babies have understanding of disgust expression
children have higher risk because they are developing
men take risks because of their higher reproductive potential
conditioned taste aversion one trial learning, stimulus and response may be separated by 24 hours (getting sick takes time)
pregnancy sickness food aversions (100%), nausea (85%), vomiting (55%)
embryo protection hypothesis pregnancy sickness acts to protect the embryo
evidence for embryo protection hypothesis right timing, aversions to teratogens (caffeine, cruciferous vegetables, meat, alcohol), observed across cultures
pregnancy sickness increases chance of successful pregnancy (three fold fewer miscarriages)
pregnancy sickness costs reduced nutrition and productivity (minimal early pregnancy additional nutritional needs, must have fat to get pregnant)
Created by: james22222222