PSYCH 1XX3 Lecture Notes - Prenatal Development, Zygote, Embryonic Stem Cell
4 Mar 2013
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Quasi-experiment: group subjects based on their existing level of a variable we wish to test. Descriptive/normative research: questions how things change normally. Analytic research: asks about processes and variables that are responsible for the changes in abilities. Longitudinal design: follow same subjects, advantage: eliminate extraneous variables, disadvantage: time consuming and expensive. Cohort effect: similar observations of people in the same generation. Dominant and recessive genes: dominant trait is expressed. Polygenic inheritance: multiple genes control the presence of a trait. Individuals are male, but resist the male hormones. Embryo: zygote attached to the uterine wall with the placenta: made of unspecialized embryonic stem cells. After six weeks of gestation, the sex organs according to the sex hormones begin to develop. After two months, embryo is called a fetus. Rooting reflex: a baby will go towards any new sensation. Maturation: a period of development in which biological processes occur in order.
