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Development - The sequence of age-related changes that occur as a person progresses
from conception to death
Zygote - A one celled organism formed by the union if a sperm and an egg
Prenatal Period - Extends from conception to birth, usually encompassing 9 months of
pregnancy
Germinal Stage - The first phase of prenatal development, encompassing the first 2 weeks
after conception
Placenta - A structure that allows oxygen and nutrients to pass into the fetus from the
mother's bloodstream and bodily wastes to pass out to the mother.
Embryonic Stage - The second stage of prenatal development, lasting from 2 weeks until
the end of the Second month.
Fetal Stage - The third stage of prenatal development, lasting from the end of the
Embryonic stage(2 months) - Birth
Teratogens - Any external agents, such as drugs or viruses, that can harm an embryo or
fetus
Fetal Alcohol Syndrome (FAS) - A collection of cogenital(inborn) problems associated with
excessive alcohol use during pregnancy
Motor Development - The progression of muscular coordination required for physical
activities
Cephalocaudal trend - The head-to-foot direction of motor development
-Children gain control of upper body before lower part of their body
Proximodistal Trend - The center-outward direction of motor development.
, -Children gain control over torso before extremities
Ex: Twisting torso rather than extending arms when reaching for something
Maturation - Development that reflects the gradual unfolding of one's genetic blueprint
Developmental Norms - Indicate the typical(median) age at which individuals display
various behaviors and abilities
Temperament - Refers to characteristic mood, activity level, and emotional reactivity.
Longitudunal Design - Investigators observe one group of participants repeatedly over a
period of time
Cross-Sectional Design - Investigators compare groups of participants of differing age at a
singe point in time
Cohort Effects - Occurs when differences between age groups are due to the groups
growing up in different time periods
Attachment - Refers to the close, emotional bonds of affection that develops between
infants and their caregivers
Separation Anxiety - Emotional distress in many infants when they are separated from
people with whom they have formed an attachment
Strange Situation Procedure - Infants are exposed to a series of eight separation and
reunion episodes to asses the quality of their attachment
- Research done by Mary Ainsworth
Stage - Developmental period during which characteristic patterns of behavior are exhibited
and certain capacities become established
Erik Erikson's Stage Theory - Posits that people evolve through 8 stages over the life span
Trust vs Mistrust - This first stage encompasses the first year of life. An infant has to rely
solely on adults to take care of them and provide their basic needs. If these needs are
supplied adequately, the infant should build an optimistic output towards the world where if
it is not a pessimistic personality may result because of it.
-"Is my world predictable and supportive?"