chapter 4 - life begins at conception
Prenatel development
3 stages;
1) Zygote - the fertilized egg, rapid cell devision, and developing into an embryo. 0 - 2 weeks.
2) Embryo - 2 weeks - 8 weeks.
3) Fetus - developing human organism from 9 weeks after conception to birth.
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pg. 184.
Crystallized intelligence - one's accumulated knowlegde as reflected in vocab and analogies tests - increases up to old age.
Fluid intelligence - one's ability to reason speediy and abtracly, as when sovling novel problems - decreases slowly up to age 75 or so, then more rapidly, esp. after age 85.
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