Aggression Flashcards
Neural and Hormonal Mechanisms; Genetic Factors; Evolutionary Explanations; Ethological Explanations; Frustration Aggression Hypothesis; Deindividuation; Social Learning Theory; Media Influence; Institutional Aggression
What type of mechanism is the limbic system?
Neural
What is the limbic system?
Area of the brain that helps coordinate behaviours that satisfy motivational emotional urges
What are the two areas of the brain in the limbic system that are key to aggressive responses?
Amygdala
Hippocampus
What role does the amygdala play?
Assessing emotional importance
Forming a response to environmental threats
What originates in the amygdala?
Aggressive thoughts or behaviours
What is the role of the hippocampus?
Formation of LTM
Comparing between previous and current threats
What type of mechanism is serotonin?
Neural
What is the role of serotonin?
Inhibits neurons
Linked to greater behavioural self-control
Where have abnormal levels of serotonin been found?
Orbitofrontal cortex
What effect do low levels of serotonin have?
Increase aggression
Reduce self-control
Increase impulsive behaviours
Strength of neural (amygdala) - research support
Gospic
Created a laboratory method of assessing aggression and the amygdala
If treated unfairly, amygdala was activated (fMRI)
Strength of neural (hippocampus) - evidence
Raine et al
“Unsuccessful” psychopaths (caught, impulsive acts) compared to “successful” psychopaths (evaded law, cold and calculating)
MRI scans revealed hippocampus in either hemisphere differed in size in “unsuccessful” group
Asymmetry presumed to arise early in brain’s development
Leading individuals to process emotional information incorrectly
Strength of neural - practical application
Reducing aggression
Drug treatment to increase serotonin levels
What type of mechanism is testosterone?
Hormonal
What is testosterone?
Androgen that produces male characteristics
What gender is testosterone found in?
Males and females
What is the role of testosterone?
Observed that males are more aggressive than females so the belief is that testosterone is associated with aggression
Strength of hormonal - research support
Mehta and Johnson
Measuring testosterone before and after a loss
After they all lost, asked if they’d like a rechallenge
High testosterone = 73% rechallenge
Low testosterone = 23% rechallenge
Strength of hormonal - practical application
Reducing aggression
Chemical castration of violent offenders
Limitation of neural and hormonal mechanisms - legal system
This theory is biologically deterministic
Means that criminals aren’t guilty?
Legal system doesn’t believe in determinism
What has been found out about aggression in twin and adoption studies?
Genes have been associated with high levels of testosterone, dopamine and serotonin receptors
What is the MAOA enzyme?
Enzyme which breaks down other neurotransmitters once they have been activated
What does the MAOA enzyme affect?
Serotonin in the brain
What variant of MAOA gene is the warrior gene?
Low
Does having the MAOA gene mean that you are immediately aggressive?
No
Must have low MAOA
What gene is the MAOA chromosome on?
Mutation on X chromosome
Strength of genetic - Brunner et al
Dutch family case study
28 male family members repeatedly involved in impulsively violent criminal behaviours (rape, attempted murder, assault)
Men had both abnormally low levels of the enzyme MAOA in their brains and the MAOA-L variant (the “Brunner” syndrome)
Counterpoint genetic - Brunner et al
Problems with case studies
Cannot be generalised
Is the evolutionary explanation human or animal?
Human
What is mate competition?
Men are worried about cuckoldry
Want to ensure that the child is theirs but can never be 100% sure
Use aggression to ward off any potential males who may try to take their partners
What physical differences do men have due to physical fights?
Stronger jawlines, brow bones and skulls
What is cuckoldry?
Having to raise another man’s offspring
What are mate retention strategies?
Men will be aggressive towards their partners as well
Negative inducements and direct guarding
What are negative inducements?
When a partner says negative things to say the other is not good enough for the relationship and doesn’t deserve to be loved
What are examples of negative inducements?
Emotional blackmail
Lowering partner’s self-esteem
What is direct guarding?
Controlling behaviours
What are examples of direct guarding?
Checking their phone
Restricting
Strength of evolutionary - practical application
Education about healthy relationships
Charities, support, resources for domestic violence
Limitation of evolutionary - temporal validity
If only reason is cuckoldry
Paternity tests should remove that
And homosexual relationships
Adoption, donors
Strength of evolutionary - can explain gender differences
Campbell
Suggests women don’t display aggressive behaviour as it would be maladaptive (not beneficial) as it would put her and her child’s survival at risk
Why females are verbally aggressive
Counterpoint evolutionary - can explain gender differences
Females can be physically aggressive
AO3 of evolutionary - nature vs nurture
Is it biological?
Is it societal pressures/norms?
Are ethological explanations human or animal?
Animal
What does the ethological explanation believe?
Aggression is adaptive
Promotes survival by protecting resources and establishing dominance