Aggression

Rehm

Studied deindividuation in a children's handball game. The boys team who wore matching shirts were more aggressive than the team in non-matching clothes. Deindividuation=aggression.

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Zhang

Supports the role of leptin in hunger and dieting failure. Some mice have two copies of the gene for obesity and they also have a defective gene for leptin production. Injecting these obese mice with leptin made them lose weight, showing low leptin p

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Bandura

Bobo doll study. Children watched an adult play with the doll nicely or aggressively and were then invited to play with the doll. 1/3 of children who say the adult behave aggressively to the doll copied the behaviour. Also more likely to copy if the

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Bandura and Walters

Follow up of Bobo doll study but to prove vicarious conditioning. Found children were more likely to copy adult's aggressive behaviour if they saw the adult getting rewarded for it.

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Miles and Carey

Meta analysis of 24 twin studies. Concluded genetics account for up to 50% of aggression. The environment had less of an effect as twins got older

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Plemin

Replicated Bobo doll study but with monozygotic/dizygotic twins witnessing the adult playing with the doll aggressively. There was no difference in correlation regardless of what type of twin they were, showing the amount of genes shared don't influe

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Dutch Family

Male members who behaved violently were found to have low levels of the MAOA protein, thought to be due to having the defective gene

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Caspi

Found children with low MAOA were only aggressive if they'd been maltreated. Those with it who were well treated weren't aggressive. Shows no direct cause and effect between gene + aggression

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Paterline and Peterson

Said prisoner aggression is due to stressful and oppressive conditions - Deprivation model

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Sykes

Said aggression in prison was caused by loss of liberty, autonomy and personal security

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McCorkle

Found overcrowding, lack of privacy and lack of meaningful activity influence peer violence

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Nijman

Contradicts deprivation model. Found increased personal space didn't decrease violent incidents. This was in a psychiatric institution not a prison however

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Irwin and Cressey

Proposed the importation model. Says prisoners aren't blank slates when they enter the prison system. Aggression is learnt before and imported in with them .Its not the prison conditions causing it. If someone was likely to commit a certain offence o

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Jiang

Found stressful and oppressive conditions of prison impacted aggression to staff but previous experiences had the biggest effect. Supports importation

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Delisi

Contradicts importation. Found pre prison gang membership made prisoners no more likely to be aggressive, especially because they are often isolated in prison

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Burch and Gallop

Found a positive relationship between violence and pregnancy. Aggression doubled with fear of infidelity

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Valladares

Suggests violence towards a pregnant partner is to terminate the pregnancy as 1/2 of physically abused pregnant women who were questioned had suffered blows to the abdomen.

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Wilson

Found women who indicated their partner was jealous were more likely to report experiencing violence

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Shackleford

Showed a positive correlation between men reporting to use retention techniques and women reporting their partner had been violent to them

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Palmer and Tilly

Male youth street gang members had more sex than ordinary young males. Supports evolutionary theory of aggression for mates

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Bosnia case study

During the genocide program 20,000 women were ***** and the fact that they were forced to have the baby supports the idea of soldiers doing it to spread their genes to other territories

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Leunissen

Found military men have greater sex appeal if they have been observed showing bravery in combat

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Neave

Group display in sports. Players (especially the goal keeper) had more testosterone on home games. Territoriality

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Foldesi

The racist conduct of a core of extremist Hungarian football supporters led to an increase in spectator's violence and xenophobic outbursts

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Basketball study

Found the home advantage is due to territoriality not fan support as basketball players performed better when there were no spectators there.

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Nelson

Found a generally positive correlation between androgen levels and aggression in prisoners

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Wagner

Castrated male mice showed decreased aggression and when they were injected with testosterone it increased again.

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Raleigh

Supported role of serotonin in inhibiting aggression. Monkeys with high tryptophan diets (increases serotonin levels) had lower aggression levels than those with low tryptophan diets

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Mann et al

Found low serotonin results in aggression in men but no effect in women.

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Aggression

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