biological explanations for aggression
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- Created by: Atlanta
- Created on: 31-12-12 15:21
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- Biological explanations of aggression
- neurotransmitters
- low levels of serotonin
- A02 -Raleigh et al fed monkeys on high tryptophan diets (increases serotonin) found decreased aggression.
- A02 - Bond found anti-depressant drugs that elevate serotonin levels reduce impulse aggression and irritability.
- slight link between high levels of dopamine and aggressive
- A02 - Couppis & Kennedy dopamine is positive reinforcer in mice for engaging in a aggressive event. They will intentionally seek it out.
- low levels of serotonin
- hormones
- testosterone
- A02 - Albert et al found no relationship between testosterone and aggression - those that did had small samples and self reports
- A02/AID - Gender bias - most studies use males.
- A02 - Archer et al - women with higher testosterone levels has higher occupational status, (may be more assertive?)
- cortisol's mediating effect
- A02 - McBurnett et al - boys with low cortisol began anti-social acts at a younger age and exhibited 3 times number of aggressive symptoms
- testosterone
- genetic factors
- MAOA - Could be a gene for aggression
- A02 - Brunner - violent dutch family - men had abnormally low levels of MAOA and a defect to the gene
- twin and adoption studies
- A02 - Hutchings & Mednick, in 14,000 adoptions boys with criminal convictions had genetic parents with convictions also. - biological
- A02- Coccaro found in a twin studiy, a 50% variance in direct aggressive behavior could be attributed to genetic factors
- Methodoclogical issues - studies fail to distinguish between violent and non violent (on off crime) making it more difficult to untangle the role of genes
- MAOA - Could be a gene for aggression
- IDA
- links between biological mechanisms ie. serotonin and testosterone with aggression are well established in non human animals but not so clear in humans - may not be sufficient to explain certain aspects of aggression
- Reductionism
- Untitled
- links between biological mechanisms ie. serotonin and testosterone with aggression are well established in non human animals but not so clear in humans - may not be sufficient to explain certain aspects of aggression
- neurotransmitters
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