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Lecture

Lecture 21 Notes

4 Pages
121 Views
Fall 2010

Department
Psychology
Course Code
PSYB10H3
Professor
Ingrid L.Stefanovic

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Lecture 21
Aggression
Aggression
Intentional behavior aimed at causing physical or psychological pain
Two dimensions of classification:
oType of pain
Physical aggression aggression inflicting physical pain
Verbal or relational aggression saying or doing psychological hurtful things
oGoal of pain
We make a distinction between hostile and instrumental aggression
Hostile Aggression:
Aggressive behavior that stems from feelings of anger and has the goal of
inflicting pain
Instrumental Aggression:
Aggressive behavior that inflicts pain and the pain is a middle step
toward another goal (not always negative)
Approaches to Aggression
Why do people do it?
oI was born that way” Genetic predisposition
oThe booze made me do it Chemical influence
oI was having a bad day Frustration-aggression theory
oToo much violence in the media” Social learning theory
Genetic Predisposition
oBasic theoretical premise: aggression is adaptive and has survival value
oEarliest evidence: animals can be bred for aggression (Rottweilers). Twin studies find
high heritability for aggression.
oAmygdala stimulating amygdala can lead to aggression.
Depends on context (emphasizes that there is an interaction between neuro and
social context)
Sometimes leads to withdrawal/fear (in a context where you probably
wont win a fight)
Relative social status matters
oPre-frontal Cortex
PFC may be the regulator of aggressive impulses
Generally involved in planning & behavioural regulation
Relation of PFC and aggression:
Murderers have less PFC activity than normal controls
PFC becomes activated when contemplating an aggressive act
oTestosterone
The steroid hormone testosterone may increase aggression
Greater exposure to testosterone in womb linked to aggression
Although injecting testosterone does not increase aggression
Testosterone-aggression is weak effect, r=.14
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Description
Lecture 21 Aggression Aggression Intentional behavior aimed at causing physical or psychological pain Two dimensions of classification: o Type of pain Physical aggression aggression inflicting physical pain Verbal or relational aggression saying or doing psychological hurtful things o Goal of pain We make a distinction between hostile and instrumental aggression Hostile Aggression: Aggressive behavior that stems from feelings of anger and has the goal of inflicting pain Instrumental Aggression: Aggressive behavior that inflicts pain and the pain is a middle step toward another goal (not always negative) Approaches to Aggression Why do people do it? o I was born that way Genetic predisposition o The booze made me do it Chemical influence o I was having a bad day Frustration-aggression theory o Too much violence in the media Social learning theory Genetic Predisposition o Basic theoretical premise: aggression is adaptive and has survival value o Earliest evidence: animals can be bred for aggression (Rottweilers). Twin studies find high heritability for aggression. o Amygdala stimulating amygdala can lead to aggression. Depends on context (emphasizes that there is an interaction between neuro and social context) Sometimes leads to withdrawalfear (in a context where you probably wont win a fight) Relative social status matters o Pre-frontal Cortex PFC may be the regulator of aggressive impulses Generally involved in planning & behavioural regulation Relation of PFC and aggression: Murderers have less PFC activity than normal controls PFC becomes activated when contemplating an aggressive act o Testosterone The steroid hormone testosterone may increase aggression Greater exposure to testosterone in womb linked to aggression Although injecting testosterone does not increase aggression Testosterone-aggression is weak effect, r=.14 www.notesolution.com
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