Ch. 11: Human Development Across the Lifespan Flashcards
development
sequence of age-related changes that occur as a person progresses from conception to death
prenatal period
from conception to birth (9 months)
germinal stage
first 2 weeks, cells duplicate, implantation
placenta
structure that connects mother and fetus
embryonic stage
2 weeks-end of 2nd month, most vital organs and systems begin to develop, most vulnerable
fetal stage
2 months-birth
teratogens
external agents (drugs and viruses) that can harm an embryo or fetus
motor development
progression of muscular coordination required for physical activities
cephalocaudal trend
babies gain control of upper body before lower
proximodistal trend
babies gain control of torso before extremities
maturation
development that reflects gradual unfolding of one’s genetic blueprint
fetal alcohol syndrome
microcephaly, heart defects, delayed development, mental retardation
threshold of viability
23-26 weeks
developmental norms
typical age at which individuals display various behaviors and abilities
temperament
characteristic mood, activity level and emotional reactivity
longitudinal design
investigators observe one group of participants repeatedly over a long period of time, sensitive to developmental changes but participants often drop out