AP Psych-Developmental Psychology  Created by paulineyooo 
Remove ads  56 terms  cross sectional research  compare groups
of people of various ages on similar task--can reveal the
average age of certain skills and abilities. (used more
frequently)  continuous growth  gradual process--growth happens
slowly  discontinuous growth  growth happens in leaps or spurts
critical period  time during which a skill or ability must
develop or it probably never will (Language by age 12)
chronological age  time since you were born  biological age
physical health (organs, diseases, accidents, nutrition,
exercise)  psychological age  affected by experiences and
predispositions  social age  roles and peer groups  germinal
stage  sperm and ovum unite to form a zygote (2 weeks), it then
implants in the uterine wall  embryonic stage  (to 8th week),
organ formation; about 1.5 inches long  fetal stage  (2-9
months) male and female/ brain and nervous system   harmful
substances that cross the placenta to affect the baby  rooting