Aggression

• Kluver and Bucy


  Destruction of amygdala in a monkey in dominant in social group caused it to lose dominant place In group.
• boccardi et al 


  found that habitually violent offenders exhibited abnormalities of hippocampus functioning
• Coccaro


  Twin studies - compared degree of similarity of aggression between sets of monozygotic and dizygotic twins.Higher concordance rate in MZ than DZ (in direct aggression)
• Lorenz


  Hydraulic model
• Dollard


  Theory that suggested that any stimulus that prevents individual from archiving goal leads to frustration and then aggression
• Geen


  investigated effect of frustration on aggression. Puzzle, insulted gave more shocks than non insulted. So frustration caused aggression.
• Bandura and Walter


  aggression learnt thru social influence (observation and imitation)
• Hesmann 


  studied 557 children aged 6-10 in 1977 and 329 in 1992.

  found exposure to violent tv was more predictive of adult aggression later in life.
• Greitmeyer and mugge


  investigate effects of violent video games. Meta-analysis of 98 studies since 2009. one game was to harm another character and th other game was to benefit another character. the violent game linked to an increase in aggressive outcomes. and the pro-social game showed an opposite effect.So in conclusion the aggresive game correlated with aggression.