Textbook Chapter 9 Flashcards
what approach is chapter 9 about?
the biological approach
people often expect children’s personalities to resemble…
their parents
early view of baby’s personalities
were thought to be blank slates
limited by diffs in intelligence or physical skills, maybe, but otherwise equally able to develop into any type of person
but this view has changed - no reputable psychologist today would deny that personality is at LEAST PARTLY result of INHERITED BIOLOGICAL INFLUENCES
differences in physical functioning…
translated into differences in personality/behaviour
ie. diff brainwave activity, hormone levels, heart-rate responsiveness…
human personality is product of…
many years of evolutionary development
move away from blank slate take on personality partly due to…
move away from behaviourism
which ignored individual diffs in newborns
3 ways psychologists have used biological concepts to explain personality that will be explored in this chapter
- Hans Eysenck’s ideas
- temperaments
- evolutionary personality psychology
what was Eysenck first concerned with?
figuring out the underlying structure of personality
he employed factor analysis and found types/supertraits
Eysenck’s three basic personality dimensions
- extraversion-introversion
- neuroticism
- psychoticism
basic level of Eysenck’s personality model
specific response level
^ consists of specific behaviours
ie. watch a man laughing with his friends on a certain day
second level of Eysenck’s personality model
habitual response
^ when specific behaviours repeat themselves frequently
ie. a man laughing with his friends most days of the week
third level of Eysenck’s personality model
trait level
^ when habitual responses are very important to the person, and are defining of them
ie. a man that lives for social gatherings - exhibits the TRAIT OF SOCIABILITY
fourth level of Eysenck’s personality model
supertrait level
ie. trait like sociability is part of a LARGER DIMENSION of personality - that of EXTRAVERSION
outline of Eysenck’s personality model
from top to bottom
- supertrait level (ie. extraversion)
- trait level (ie. sociability, impulsiveness, activity, liveliness, excitability)
- habitual response
- specific response
Eysenck’s extraversion/introversion dimension
EXTRAVERT: sociable, like parties, many friends, needs to talk to people, doesn’t like reading or studying alone
INTROVERT: quiet, retiring sort of person, introspective, fond of books rather than people reserved and distant except to intimate friends
most people fall in between these two extremes
Eysenck’s neuroticism dimension
HIGH scores: tendency to respond emotionally
^ unstable, highly emotional, more easily upset, angered, depressed
Eysenck’s psychoticism dimension
HIGH:
^ egocentric, aggressive, impersonal, cold, lacking in empathy, impulsive, lacking concern for others, unconcerned about rights/welfare of others
Eysenck quote on heritability
“heritability is not a fixed number. once you realize what’s inherited, there’s a lot you can do about it”
Eysenck’s 3 arguments in his case that individual personality differences are based in biology
- consistency of extraversion-introversion over time
- cross-cultural research
- studies indicate genetics play important role in determining person’s placement on each of the 3 personality dimensions
Eysenck’s consistency of extraversion-introversion over time argument
study found that Ps extraversion-introversion scores remained consistent of 45 year time span
BUT this finding alone doesn’t establish biology’s role in personality
- could be that people remain in similar environments throughout their lives
- OR that after this part of personality is cemented, it is hard to change
Eysenck’s cross-cultural research argument
find same 3 dimensions of personality in studies from all sorts of countries/cultures
even appear when using different data-gathering methods
level of cross-cultural consistency = unlikely unless biological factors were largely responsible for personality
how much of variance in personality did Eysenck say could be traced back to biological factors?
2/3rds
biology probably sets limits on HOW MUCH WE CAN CHANGE an introverted friend into a highly sociable person
or LIKELIHOOD of shaping an impulsive, outgoing child into a calm, easygoing adult
Eysenck’s physiological explanation for diff between extraverts and introverts
they have diff levels of CEREBRAL CORTEX AROUSAL when in non-stimulating environments
EXTRAVERTS have lower level of cortical arousal than introverts
^ as a result, they SEEK OUT HIGLY AROUSING SOCIAL BEHAVIOUR because their cortical arousal is well below desired levels
INTROVERTS instead operate at cortical arousal level NEAR or ABOVE the optimal amount
^ select solitude/non-stimulating environments to keep their already high arousal from becoming too aversive
has research discovered the base-rate cortical arousal referenced by Eysenck?
no
introverts and extraverts DO DIFFER in how certain parts of their brains respond to emotional stimuli
BUT show NO DIFF in brain-wave activity when at rest or asleep
HOWEVER there is evidence that introverts are MORE SENSITIVE to STIMULATION than extraverts
differences in sensitivity to stimulation between…
introverts and extraverts
introverts are MORE QUICKLY and STRONGLY AROUSED when encountering loud music/active social encounter
introverts are more RESPONSIVE than extraverts when exposed to CHEMICAL STIMULANTS (caffeine, nicotine)
now, rather than describing introverts and extraverts in terms of differences in cortical activity…
describe them as different in their SENSITIVITY TO STIMULATION
but effect of this is the same as what Eysenck proposed:
“because of physiological differences, introverts are more quickly overwhelmed by the stimulation of a crowded social gathering, whereas extraverts are likely to find the same gathering rather pleasant. extraverts are quickly bored by slow-moving movie plots and soft music, but introverts often find these subtle sources of stimulation engaging”
reinforcement and biological-based differences between introverts and extraverts
reinforcement sensitivity theory
reinforcement sensitivity theory
each human brain has a BEHAVIOURAL APPROACH SYSTEM (BAS) and a BEHAVIOURAL INHIBITION SYSTEM (BIS)
individuals DIFFER IN STRENGTHS of these two systems
highly active BAS = intensely motivated to seek out/achieve pleasurable goals
highly active BAS
part of reinforcement sensitivity theory
high BAS = VERY MOTIVATED to seek out and achieve pleasurable goals
- get more pleasure out of rewards
- get more ENJOYMENT out of EVEN ANTICIPATING that rewards are coming
- experience MORE ANGER/FRUSTRATION when they FALL SHORT of reaching anticipated sources of pleasure
people with highly active BIS tend to be…
more APPREHENSIVE than others
approach new situations WARILY
on CONSTANT LOOKOUT for danger
QUICK TO RETREAT when they sense problems
anxiety and highly active BIS
more likely to experience anxiety than low BIS people
Hans Eysenck birth-death years
1916-1997
Eysenck background
born in Germany into a family of celebrities
father: actor and singer - idol in Europe
mother: silent film star
parents planned glamorous career in entertainment field for Hans, starred ina film when he was 8
but then his parents divorced
most of his early years were spent with his Gma in Berlin
pursued physics and astronomy
then moved to England
career at uni of London
Eysenck background psychology-related
uni of London
pursued biology controversies
paper challenging effectiveness of psychotherapy
especially critical of psychoanalysis
Eysenck - “controversialist in the intellectual world”
he was very combative
against psychotherapy and psychoanalysis
pro biology differences
pro cigarettes
he liked this - “I have usually been against the establishment and in favour of the revels”
most researchers see connection between BAS and _______ and BIS and ______
BAS and extraversion
BIS and neuroticism
means that people with highly active BAS are similar to those scoring high in extraversion
and people with highly active BIS are similar to those scoring high in neuroticism
implication of BAS: extraverts aren’t necessarily attracted to…
ALL social situations
but ONLY to those that are likely to be enjoyable
^ one study found that extraverts actually preferred nonsocial situations (going for a solo walk) more than introverts if they thought the experience would be pleasant
is it likely that some people are born to be sociable while others are born to be shy?
no
more likely that we’re born with BROAD DISPOSITIONS towards certain TYPES OF BEHAVIOURS - aka temperaments
temperaments
general patterns of behaviour and mood
can be expressed in many ways
depending on one’s experiences, develop into diff personality traits
how general dispositions (temperaments) develop into stable personality traits depends on…
complex interplay of one’s GENETIC PREDISPOSITIONS and the ENVIRONMENT that a person grows up in
researchers often disagree on the ________ of basic temperaments
number
three temperament dimension moel
- emotionality
- activity
- sociability
three temperament model: emotionality
INTENSITY of emotional REACTIONSS
HIGH: easily upset, reactive temper
three temperament model: activity
general level of ENERGY
HIGH: move around a lot, prefer active hames, fidget and squirm, always on the go
three temperament model: sociability
general tendency to AFFILIATE and INTERACT with others
HIGH: seek out others, lots of friends, enjoy social gatherings
where do temperaments come from?
largely inherited
we can identify temperamental diffs in babies
not all babies are born alike - some are more active, more emotional…
gender diffs in temperament
GIRLS: more likely to exhibit EFFORTFUL CONTROL temperament
^ ability to FOCUS ATTENTION and EXERCISE CONTROL over impulsive urges
BOYS: more likely to have a SURGENCY temperament
^ high levels of ACTIVITY and SOCIABILITY
surgency temperament
more common in boys
high levels of activity and sociability
age at which gender diffs in temperament can be seen
about 3 months of age