what is the biological perspective of personality
personality cannot be properly understood without identifying and understanding its biological underpinnings
what are the 3 major biological perspectives of personality
evolutionary: the main goal of every single organism is to survive and reproduce
behaviour genetics perspective: nature vs. nurture, how much relies on genetics
neurological perspective: personality is linked with the functioning and structure of the brain
what is the evolutionary perspective (personality)
the main goal of every organism is to survive and reproduce
- any trait that helped our ancestors survive is a personality trait that modern humans are likely to have (natural selection)
- different personality traits have different values in diff environments
we need a variety of traits in people, if people had the same personality, it would threaten our survival
what is the behaviour genetics perspective (personality)
nature vs nurture and how much of our differences are due to genetics vs environment
- study heritability
- twin adoption studies
results suggest that personality has a strong genetic component
what is the neurological perspective (personality)
personality is linked with the functioning and structure of the brain
psychopaths tend to have ___ frontal lobes
smaller and less active
high neurotics
tend to have lower serotonin and higher levels of activity in the AMYGDALA
- serotonin is a neurotransmitter that is calming and relaxing
sensation seekers
driven to seek novel, exciting, high sensory experiences and will do them even when they are risky
tend to get bored easilt
have HIGHER DOPAMINE activity –> have an overexaggerated response to reward
extraversion-introversion
linked and associated with the ARAS
personality dimension –> it is a continuum ranging from extraversion and introversion
heritability studies
apply to individual differences and only individual differences
- applied to differences WITHIN a group
does not apply to: our own personality, one single person, or differences BETWEEN groups
what are traits linked to survival
conscientiousness: makes individuals more likely to engage in health-promoting behaviours and avoid risks
optimism: makes individuals more likely to have fewer symptoms and a quicker recovery when dealing with medical concerns
what are 2 traits less conductive to survival
hostile type A personality:
tend to supress feelings of emotional distress, which increases the effects of these emotions on health
- leads to drug and alcohol abuse
neuroticism:
tend to be overly moody, unstable, anxious
- leads to general state of hyperarousal and tension
ARAs
bundle of neurons in the brainstem that project upward into the brain
extraversion (ARAs)
linked and associated with lower activity in the ARAS
when brain is at rest, it has a lower level of arousal –> extraverts will seek stimulating social experiences to increase their level of arousal
introversion (ARAs)
linked and associated with higher levels of activity in the ARAs
at rest, introverts have a higher level of arousal –> will seek quiet and calm environments to ensure their level of arousal does not go too high
traits definition
the terms we use to describe personality characteristics that reflect the essence of who we are as people
(NOT PHYSICAL TRAITS)
goals of traits
factor analysis
a statistical technique used to identify common factors that underly test items
three factor theory
eysenck trait theory
identified 3 dimensions and described personality as a combination of these 3 primary trait dimensions
believed the dimensions to be biologically based and genetically influenced
what are the 3 dimensions of eysenck’s trait theory
EXTRAVERSION-INTROVERSION
extraversion: low ARA lvls
introversion: high ARA lvls
NEUROTICISM-EMOTIONAL STABILITY
neuroticism: high activity lvl in sympathetic nervous system
emotional stability: low activity lvls in SNS
PSYCHOTICISM-IMPULSE CONTROL
psychoticism: aggression/impulsiveness linked with high levels of testosterone and low levels of MAO
five factors model (FFM)/big 5 personality factors
is FFM limited to specific cultures
No
does FFM have predictive values
yes, can predict academic success
how is FFM linked to occupational choices and grades
Rock musicians –> high openness
High extraverts –> more likely to start a business
High conscientiousness –> higher grade-point averages
High neuroticism –> lower exam scores