Development Flashcards
Zygote
Fertilized egg with chromosomes from egg and sperm
Prenatal stages-3
- Germinal stage
- Embryonic stage
- Fetal stage
Germinal stage
- 2 weeks
- begins conception
- zygote divides and implants in uterine wall
Embryonic stage
- week 2-8
- zygote divides in uterine wall
- cells differentiate
- zygote is an embryo
Fetal stage
- 9th week-birth
- fetus has skeleton and muscles
- myelination of neurons begins
Human brain development
- mostly happens after birth
- head and brain grow
Prenatal environment
-influences genes even while fetus develops in the womb
Teratogens
- agents that destroy development
- ie environmental poisons (lead, paint dust etc)
- alcohol, tobacco
Fetal alcoholism
- developmental disorder that stems from heavy alcohol use by mother during pregnancy
- facial features, abnormal brain,
Tobacco during pregnancy
-low birth weight babies
Infancy
- birth-18 to 24 months
- perceptual and motor development
- cognitive development
- social development
- moral decelopment
Motor development
- physical actions: reaching, crawling, grasping
- reflexes: motor response to stimulation (ir sucking reflex for breasts feeding)
Cephalocaudal rule
-motor skills develop head to foot
Proximodistal rule
Motor skills develop from center to extremities
Cognitive development
- ability to think and understand
- jean Piaget
3 tasks of cognitive development
- how physical world works
- how minds represent it
- how other minds represent it
Piaget’s 4 stages of cognitive development
- Sensorimotor (birth-2)
- Preoperational (2-6)
- concrete operational (6-11)
- Formal operational (11+)
Sensorimotor
- develop schemas
- object permanence
- assimilation
- accomodation
Schemas
- theories/models of how the world works
- assimilation can occur
Assimilation
Apply schemas to other situations
-ie pull object closer and realize that doing the same things to other objects produce the same effect
Accommodation
- infants revise schemas in light of new information
- ie pull cat closer, cat runs away; child realizes that only pulling inanimate objects makes them come closer