Lifespan Development Flashcards
Embryonic stage
Beginning of third week through 8th week of pregnancy
Germinal stage
First two weeks of pregnancy
Fetal stage
Ninth week until birth
At birth, brain is __% of adult weight
25%
By two years of age, brain is __% of adult weight
80%
Brain is at adult weight by what age?
16 years
What age does the brain start shrinking, and when does is accelerate?
Starts to shrink at age 30, acceleration of atrophy after age 60.
Four major newborn reflexes
Babinski (toes out/up); Rooting (head in direction of cheek touch); Moro (startle with arms and legs out then toward body); Stepping
Which sense is least developed at birth?
Vision; but by about 6 months acuity is near that of adult; limited color vision by two months of age and some depth perception by 4-6 months
Order and ages for Piaget stages
Sensorimotor (birth-2 years); Preoperational (2-7 years); Concrete operational (7-11 years); Formal operational (11+ years)
Preoperational
Characterized by magical thinking, egocentrism, centration, and irreversibility
Concrete operational
children learn conservation
Formal operational
abstract thought and hypothetico-deductive reasoning; adolescent egocentrism
Sibling relationships over the lifepan
Preschool: posocial/play; Middle childhood: closeness/conflict and cooperation/competition; Adolescence: less time together and less emotional intensity, more egalitarian
Earliest emotions displayed by children
interest, sadness, disgust, distress (soon after birth)
