Biological Shiiii Flashcards
What are the 3 laws of behavioural genetics
- All human behavioural traits are heritable
- Effect of being raised in the same family is smaller than gene effects
- Large part of variation in complex behavioural traits not accounted for by gene or family
Roughly what percentage of behaviour is attributed to genetics
40-50%
Roughly what percentage of behaviour is attributed to shared environment?
0-10%
Roughly what percentage of behaviour is attributed to unshared environment
50%
What are the limitations of twin studies
- Restriction of range problem
- Haven’t identified influential non-shared environmental factors
- Confounding variables galore
- Can’t eliminate shared parental influence
Which 3 brain imaging techniques detect which parts of the brain are working
CT, PET, fMRI
What does the hypothalamus do?
Hormones, links limbic and hormone systems
What does the amygdala do
Emotions
HIPPOCAMPUS <3
Memory
Cerebral cortex
Higher order thinking, emotional regulation etc.
What brain activity is associated with high agreeableness?
More frontal lobe activation
Why does agreeableness require frontal lobe activation
Need to consider other’s perspectives and be social, both require a lot of brain power
What neural activity is associated with high neuroticism
More amygdala activation
Why does neuroticism lead to amygdala activation?
Processes fear and discrepancy
What neural activity is associated with high extraversion?
Increased amygdala activation for positive emotions
What neural activity is associated with low conscientiousness (high impulsivity)?
Increased activity in ventral striatum (reward response)
What neural activity is associated with high openness
Trick question its none
Which of the big 5 are associated with high dopamine levels
High extraversion, high openness, high impulsivity
Which of the big 5 are associated with high serotonin
High conscientiousness, high agreeableness, high emotional stability
Which neurotransmitter facilitates approach behaviours
Oxytocin and dopamine
Which neurotransmitter increases perceptions of trustworthiness and attractiveness?
Oxy
Which gender desires sociosexuality more?
Men
If evolution is universal, why do people differ in traits?
Environments are not consistent over time
