Development Flashcards
developmental psychology
the study of physical, cognitive, and emotional changes over a lifespan
phases of lifespan
infancy (and toddlerhood), childhood (3-early MS), adolescence, adulthood
themes in developmental psych-nature vs nurture
- does development happen cuz of biology or stuff we learn? both
- nature: maturation-physically driven changes, based on biology-puberty, grow teeth-can’t influence/decide these changes-genetically predisposed
nurture: learning, socialization-learning to make friends, how to act in public, share, away from parents
themes in developmental psych-continuity vs discontinuity
- does development happen gradually on a continuous path or does it happen in stages?
- most theories include stages
- ex: height, boys have growth spurts so have stages, with girls it’s more gradual and continuous
developmental psych-research methods
longitudinal data: watch first graders, keep watching same kids until they’re seniors
cross-sectional studies: watch 1st graders, 2nd grader, 3rd graders, etc., in same year-diff kids
prenatal development
zygote, embryo, fetus
prenatal development-zygote
after conception happens-fertilized egg-for about 2 weeks-zygote implants on the uterus wall, becomes an embryo
prenatal development-embryo
- 2 weeks post-conception to 8 weeks post-conception
- central NS and major organs begin to form-may see spontaneous abortion/miscarriage here if these don’t form
fetus
-week 8 to week 38-40 (full term)-at about 15 weeks, the major organs start to function-if don’t, then miscarriage-don’t tell friends until then (3 months)-can’t get abortion after this
age of viability
the age at which the fetus can survive outside the womb-about 24 weeks now-often have major developmental problems if born this early-cognitive problems too-but some kids are fine
normal weight of a newborn
7 lbs
influence on fetal development-good influences
pre-natal vitamins, special diet-good nutrition and exercise
influence on fetal development-bad influences
- stress
- terratogens: toxins (something poison to fetus)-things mom ingests (drugs and alc, cigarette smoke), things in environment (lead poisoning, lead in the air, paint thinner, hair dye, shellfish, fish with mercury, caffiene), diseases that get passed on (AIDS, rubella)
- Fetal Alcohol Syndrome (if mom ingests too much alc and gets alc poisoning, baby can have this-small physically and small and malformed brain)
- genetic info
Infancy
- infants are completely dependent on others
- lots of physical and cognitive development that needs to happen here-the more that needs to happen/the longer dependency is, the longer this stage lasts-so longer for more complex animals like chimps
- they do have reflexes and senses
- go through neuronal and motor skills development
Infancy-reflexes
- rooting (for food source, if touch cheek will turn head that direction)
- sucking (will suck on anything in mouth)
- grasping (will grasp anything in hand)
- Babinski (if touch bottom of foot, toes fan then curl back)
- stepping (support newborn under the arms and it’ll simulate walking strides-stops at about 2 mo)
- Moro (aka startle-an unexpected stimulus like loud noise causes child to throw arms and legs out then pull in and shake)
infancy-senses
- sight doesn’t work too well, can’t focus clearly beyond 1 ft. (good cuz caregiver’s face that far when holding baby), don’t see colors and lines too well-then gets better with age, then worse again oftentimes
- hearing and touch and smell work well
- sense of taste more sensitive than ours-if mom eats something new, baby nurses a few hours late, may refuse, not like it
infancy-neuronal and motor skills development
- babies born with many neurons, brains develop greatly in first few years, billions of neurons form in these years-many of these form myelin sheet-undergo myelinization, grow white matter-allows more messages to travel faster, more efficiently-kids improve memory, motor skills-can’t even turn over at birth, can run by 2
- brain at 80% of adult weight by age 4
Adolescence-physical development
- puberty-sexual maturation-about 2 yr before start to show changes, hormone levels rise, trigger changes-will take a couple of years for all the changes to happen
- primary and secondary sex characteristics
Adolescence-phys development-primary sex characteristics
- reproductive organs-born w these-ovaries and testes–>internal part, external part too
- trigger puberty, get secondary sec characteristics as a result
Adolescence-phys development-secondary sex characteristics
develop at/through puberty as a result of the hormones-breast and hip development for girls, beards and broader shoulders and deep voices for guys
Adolescence-the markers of the start of puberty
girls: menarche (1st period)
boys: first ejaculation/live sperm
Adulthood-physical development
- late 20s-early 30s: peak in phys development
- most of the noticeable changes happen later: 50s, 60s, 70s-vision starts to go, hearing loses some sensitivity, less of a sense of tase-gradual changes, learn to adapt-except w hearing, don’t notice, think everyone’s whispering, hiding things from you-reaction times get slower (bad w driving)
- adapt, do well, but later when very old changes start to become noticeable, impact daily life
- stay physically and mentally active to delay these changes, stay healthy and functioning well for longer
brain needs to _____ for cognitive development to occur
physically develop
Piaget’s Theory of Cognitive Development
worked w Alfred Binet, who was studying intelligence-Piaget had to interview kids for him, ask them home they thought the world worked-conclusion: kids think differently than adults, not just little adults w less knowledge-will take time to change brain wiring, have them stop making mistakes, taking things literally-he said cognitive dev hinged on phys dev-gotta wait until the kid’s brain grows-nature part-nurture important too, but Piaget thought nature was the most important
-he came up w assimilation, accommodating, and the 4 stages of cognitive development