PSYC18H3 Chapter Notes - Chapter 2: Social Status, Keith Stanovich, Orbitofrontal Cortex
Document Summary
Evolution: the theory of how species developed, has become the central concept of biology: darwin stated the similarity of human emotional expressions to those of other animals. Involve threats or opportunities directly related to physical survival. Two kinds of sexual selection pressures determine who reproduces: Intersexual competition: process by which one sex selects specific kinds of traits in the other sex. Intrasexual competition: competition for maters within a sex. Adaptations are genetically based traits that allow the organism to cope well with specific selection pressures and to survive and reproduce. Not all human traits or behaviours are adaptions some, like snoring, serve no apparent evolutionary function and are better thought as by-products. This has the dual use of being easily recognized by others: humans also have something like this we raise our eyebrows for flirting and looking friendly, but may have come from looking startled originally.
