PSYC18H3 Chapter Notes -Insular Cortex, Orbitofrontal Cortex, John Bowlby
Document Summary
Among the evidence that darwin advanced for his theory of evolution was the similarity of human emotional expressions to those of other animals. Darwin described evolution in terms of three processes: Superabundance: animals and plants produce more offspring that a necessary merelt to reproduce themselves. Variation: each offspring is somewhat different to others, and differences are passed on by heredity. Selection: those characteristics that allow better adaptation t the environment are selected because they enable survival and hence are passed on. At the core of natural selection are selection pressures (features of the physical and social environment in which humans evolved that determined whether or not they survived and reproduced). Two kinds of sexual selection pressures determine who reproduces. Intersexual competition refers to the process by which one sex selects specific kinds of traits in the other sex (e. g. women and men prefer mates of good character). Intrasexual competition is competition for mates within a sex(e. g. stags engage in battle)
