PSYCH 3F03 Lecture Notes - Brain Size, Cardiovascular Disease, Hunter-Gatherer

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Data is based on a single interview. If asked repeatedly over lifetime it will give a better indication of the prevalence of depression over lifetime: when asked repeatedly the rates go up dramatically (psychiatrist defined disorder, can true disorders peak during reproductive years, yes, it is possible! Lifetime prevalence of schizophrenia = 0. 3 0. 7% Schizophrenia is a disorder not sure what it is a disorder of. Lifetime prevalence: possible that things can be changed at development time (adolescence) however, natural selection wants to reduce the prevalence during the reproductive years so overall lifetime prevalence is really low. Another differentiation from primates is bipedalism: the ability to walk upright: chimps can do it but they don"t, humans have various morphological adaptations for walking upright. Estrus, concealed ovulation, and extended sexuality: females have displays of sexual status, chimps have blooming butts, women do not have sexual swellings because we may not have estrus. Idea of the loss of estrus is probably wrong.

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