Chapter 10; Human Development Flashcards
development psychology
the study of how behaviour and mental processes change over the lifespan
post hoc fallacy
mistaken assumption that because A comes before B, A must cause B
bidirectional influences
childrens experiences (nurture) influence their development, but their development (nature) also influences their experiences
cross-sectional design
design in which researchers examine people of different age groups at the same time
cohort effects
in cross-sectional designs there are effects due systematic generational differences
what are longitudinal designs and what do they allow us to examine?
tracking the development of the same group of subjects over time, allows us to examine developmental effects: changes over time as a consequence of ageing
attrition
in longitudinal designs participants can drop out before the study is complete
selective attrition
in longitudinal designs when the droupouts are disproportionately from a particular group
externalizing behaviours
acting out, ex. breaking rules, defying authority, committing crimes
what are the 2 myths concerning development
- infant determinism: assumption that extremely early experiences are almost always more influential than later experiences in shaping us as adults
- childhood fragility: belief that children are delicate creatures who are easily damaged
gene-environment interaction
the effects of genes depend on the environment and vice-versa, ex. low MAO gene+maltreatment= antisocial behaviour
nature via nurture
children with certain genetic predispositions often seek out and create their own environments, ex. highly fearful children select safer environments, making it appear that growing up in a safe environment created fearfulness, when the environment is actually a consequence of genetic predisposition
gene expression
when environmental experiences turn genes on and off through development, ex. weed/schizophrenia, highly stressful event/anxiety
what develops prenatally?
learning, memory, and preferences for sounds/body positions
zygote
fertalized egg
what are the 3 stages of prenatal development
- germinal stage
- embryonic stage
- fetal stage
germinal stage
0-2 weeks, zygote divides and doubles forming a blastocyst: ball of identical cells that haven’t differentiated yet
embryonic stage
3-8 weeks, cells start to differentiate, limbs, facial features, major organs (heart lungs brain) begin to form, during this stage things are most likely to go wrong like miscarriage and defects
fetal stage
9 weeks-birth, bulking up stage, embryo becomes a fetus, major organs are established, heart starts beating
what are teratogens and give examples
environmental factor that can negatively impact prenatal development, ex. illness, x-rays, alcohol, tobacco, cannabis
proliferation
when neurons in the brain develop at an astronomical rate, starting with the brain stem, 18 days - the end of month 6
what is migration of cells and when does it occur?
neurons sort themselves out, moving to their final positions in specific structures of the brain such as hippocampus/cerebellum, 4 months onward
what are the 3 ways fetal development is disrupted
- exposure to hazardous environmental influences
- biological influences from genetic disorders or errors in cell duplication
- premature birth
FASD
fetal alcohol syndrome disorder, causes learning disabilities, delays in physical growth, facial malformations, behavioural disorders
premature babies
are born before 36 weeks
viability point
point in pregnancy when infants can survive on their own, 25 weeks
infant reflexes
sucking reflex, rooting reflex: if you stroke a baby’s cheek it turns its head
motor behaviours
bodily movements that occur as a result of self-initiated force
what are the 6 major motor milestones and when do they occur?
sitting up (6 months), crawling (9 months), standing unsupported (11 months), cruising (12 months), walking (13 months), and running (18-24 months)