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11 Cards in this Set
- Front
- Back
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Neurones definition |
Chemicals that enable impulses within the brain to be transmitted from one area to the other |
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What levels of serotonin and dopamine can be linked to aggression? |
Low levels of Serotonin High levels of dopamine |
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How does serotonin work? |
Reduces aggression by inhibiting responses to emotional stimuli that might otherwise lead to an aggressive response Low levels of serotonin = high levels of impulsive behaviour, aggression and violent suicide |
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Mann et al (Serotonin) |
35 PP's took dexfenfluramine, a drug which reduces Serotonin levels.
This drug treatment in males (not females) was associated with increase in hostility and aggression scores on questionnaires they filled out
-self report techniques might not be accurate -gender bias- link only for males |
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Bond (2005) |
Evidence from antidepressants. Drugs that increase serotonin levels should decrease aggression. Found that antidepressant drugs increase serotonin levels and reduce aggression and hostility |
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2 Animal studies support |
Popova: animals that are bred for domestication and tame characters have increased levels of serotonin over the years Raleigh:Vervet Monkey Study: monkeys fed on diets high in tryptophan (increases serotonin) showed decreased levels of aggression. |
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Lavine (dopamine) |
Use of amphetamines increases dopamine levels with associated increase in aggression |
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Buitelaar (dopamine) |
Antipsychotics which reduce dopamine activity in brain reduce aggressive behaviour in violent criminals |
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Couppis and Kennedy |
Dopamine increase may be a consequence not a cause of aggression |
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Scerbo and Raine Meta Analysis of studies (support serotonin) |
29 studies published before 1992. Examined neurotransmitter levels in antisocial children and adults. Found lower levels of serotonin in people described as aggressive, no change in dopamine levels Lowest levels of serotonin in people who attempted suicide. |
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IDA for neural mechanisms of aggression |
Reductionist-ignore role of social learning in aggression (bandura) |
