PSYCH 1XX3 Lecture 1: Evolution 1 and 2(web module + lecture notes)
9 Feb 2018
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Document Summary
Adaptation: biological trait that help an individual to survive and reproduce, perform a specific function. Cognitive psychologists study the adaptive functions of mental activities. 4 basic mechanism of evolution: natural selection, genetic drift and migration. Natural selection: differential survival reproduction of organisms as a result of the heritable differences between them. Stabilizing selection- selection against any kind of departure from the species typical adaptive design. Darwinian fitness: average reproductive success of a genotype relative to alternative genotypes. Sexual selection : component of natural selection that acts on traits that influence an organism"s ability to obtain a mte ex. Two subtypes of sexual selection: female choice ( male adaptation is a display feature, success in combat ( male adaptation is a weapon) Mate choice preference is an indicator of genetic health. Species typical behaviour- physical form( typography) , habitat preference, group size, social system.
