Ch 8 Human Development Flashcards
longitudinal experiment
same group over long period of time
cross-sectional experiment
multiple cohorts at one point in time
cross-sequential experiment
multiple cohorts over time
prenatal development stages
fertilization, germinal period, embryonic period, fetal period
monozygotic vs dizygotic twins
mono- identical twins, egg split; di- two eggs fertilized at once; monozygotic twins are used to study nature vs nurture
germinal period
zygote attaches to uterus wall, placenta and umbilical cord begin to form; cell differentiation
embryonic period
2-8 weeks; organs begin to develop and there are critical periods for each of the body’s structures to begin to form
teratogen
anything that can cause a birth defect; start to have big impact during embryonic
fetal period
rapid growth, organs become functional
five baby reflexes
grasping, startle, rooting (moves to poking finger), stepping, sucking
newborn sensory function
hearing, taste, and smell are mostly in tact; takes 6 months for cones and vision to develop
motor milestones in infants
raising chin (2 months), rolling over, sitting with support (6), sitting alone, crawling, walking (12 months)
Piaget
developed cognitive development timeline
Piaget’s stages
sensorimotor, preoperational, concrete operational, formal operational
sensorimotor
0-2; object permanence, stranger/separation anxiety
preoperational
2-7; theory of mind, animistic, pretend play, egocentrism, irrevesibility
concrete operational
7-12; reversibility, conservation, concrete logic, math,