aggression n.
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  1. Aggression Aggression can be any physical or verbal behavior intended to hurt or destroy. It may be done reactively out of hostility or proactively as a calculated means to an end. Research shows that aggressive behavior emerges from the interaction of biology and experience.

  2. The Biology of Aggression Three biological influences on aggressive behavior are: • Genetic Influences • Neural Influences • Biochemical Influences

  3. Influences Genetic Influences:Animals have been bred for aggressiveness for sport and at times for research. Twin studies show aggression may be genetic. In men, aggression is possibly linked to the Y chromosome. Neural Influences:Some centers in the brain, especially the limbic system (amygdala) and the frontal lobe, are intimately involved with aggression.

  4. Influences Biochemical Influences:Animals with diminished amounts of testosterone (castration) become docile, and if injected with testosterone aggression increases. Prenatal exposure to testosterone also increases aggression in female hyenas.

  5. The Psychology of Aggression Four psychological factors that influence aggressive behavior are: • dealing with aversive events; • learning aggression is rewarding; • observing models of aggression; and • acquiring social scripts.

  6. Aversive Events Studies in which animals and humans experience unpleasant events reveal that those made miserable often make others miserable. Jeff Kowalsky/ EPA/ Landov Ron Artest (Pacers) attack on Detroit Pistons fans.

  7. Environment Even environmental temperature can lead to aggressive acts. Murders and rapes increased with the temperature in Houston.

  8. Physical Discomfort & Aggression • Heat • Humidity • Pain • Noxious fumes • Poverty • Crowding

  9. Frustration-Aggression Principle A principle in which frustration (caused by the blocking of an attempt to achieve a desired goal) creates anger, which can generate aggression.

  10. Learning that Aggression is Rewarding When aggression leads to desired outcomes, one learns to be aggressive. This is shown in both animals and humans. Cultures that favor violence breed violence. Scotch-Irish settlers in the South had more violent tendencies than their Puritan, Quaker, & Dutch counterparts in the Northeast of the US.

  11. Observing Models of Aggression Sexually coercive men are promiscuous and hostile in their relationships with women. This coerciveness has increased due to television viewing of R- and X-rated movies.

  12. Acquiring Social Scripts The media portrays social scripts and generates mental tapes in the minds of the viewers. When confronted with new situations individuals may rely on such social scripts. If social scripts are violent in nature, people may act them out.

  13. Do Video Games Teach or Release Violence? The general consensus on violent video games is that, to some extent, they breed violence. Adolescents view the world as hostile when they get into arguments and receive bad grades after playing such games.

  14. Media Violence • More TV sets in United States than toilets • Media consumption is #1 pass-time among Americans, particularly youth • 60%-70% of all TV programs contain violence • 70%-80% show no remorse, criticism, or penalty for the violence • By the time the average American child graduates from elementary school: • More than 8,000 murders • More than 100,000 other acts of violence (e.g., assaults, rape)

  15. Media Violence • More recently, video games have become kids’ favorite form of media • 90% of kids age 2-17 play regularly • Majority of popular games are violent

  16. Grand Theft Auto

  17. Media Violence • Since at least 1970, researchers have known of a link between violent media and aggression • Weakened inhibitions against violent behavior • Imitation of specific violent acts • Aggression primed as a response to anger • Desensitization to violence • Overestimation of prevalence of violence in real life

  18. Common Responses 1. “That’s all boloney. I play those games and I’ve never killed anyone.” 2. “Maybe there is an effect, but it’s really small and meaningless.” 3. “Actually, my friends and I feel better after blowing off steam playing video games.”

  19. Common Responses 1. “Not all who play violent games/watch violent media become killers.” • True. Not all smokers die of lung cancer, either. • The point is NOT whether exposure leads inevitably to criminal mayhem, but that the likelihood of aggression is increased

  20. 0.3 0.2 0.1 0 -0.1 -0.2 -0.3 Aggression Helping Hostile Hostile Arousal Thoughts Affect Effects of VVGs(Bushman & Anderson, 2001) Findings from a meta-analysis Correlation with VVG Exposure

  21. Common Responses 2. “Effects are trivially small” • False. Effects are larger than many that we take for granted

  22. Common Responses 3. “Playing violent games/watching violence allows people to “vent” feelings of anger” • False. Watching violence or engaging in virtual violence increases aggression • Catharsis doesn’t work!

  23. Media Industry Response 1. The media is simply “holding a mirror to society.” • False. Real world is far less violent than the TV/Movie world. • 0.2% of crimes are murders; 50% of crimes on TV are murders • Average of 7 characters are killed on TV each night • If applied in reality, this proportion of murder would wipe out U.S. population in 50 days

  24. Media Industry Response 2. “We’re simply giving the public what they want.” • Maybe. But viewer interest is only one factor driving programming decisions • Societal violence can be considered a hazardous by-product • Also, most popular shows (Friends, Seinfeld, Bachelor) are not violent

  25. Media Industry Response 3. “Violence sells!” • False. TV violence significantly decreases memory for commercial messages • Bushman, 1998 • 19% of viewers will be less likely to remember an ad if it is embedded in a violent or sexually explicit show

  26. Summary