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Biological Explanations of Aggression





Neurotransmitters
Low levels of serotonin. Lower your levels of serotonin the more susceptible you are to
aggressive behaviour and the less calm/controlled you will be.







"Mann"dexfenfluramine is a substance that he injected into his healthy participants
to deplete the levels of serotonin. He then gave them…

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Biological Explanations of Aggression




High levels of Dopamine. Not as well established a Serotonin. "Lavine" suggested
that there is an association between people on amphetamines and an increase in aggression.
Dopamine = puts you into a high state of physical arousal.
Research Support: "Buitelaar" violent juvenile delinquents. If you give…

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Biological Explanations of Aggression





Evaluation:
Testing prisoners so not a representative sample





High scientific credibility which gives it status





Social Psychologists would say that aggression is learnt rather than down to
biology.





Gender Bias, testosterone





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Biological Explanations of Aggression



Cant explain discrepancy between the way males and females display aggression





Cause and effect? E.g does aggression cause low levels of serotonin or do low
levels of serotonin cause aggression? There is only a clear correlation but no
cause and effect.





Individual differences are not taken…

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Biological Explanations of Aggression







Deterministic- takes away free will therefore excuses aggressive behaviour
(Ethics)






Reductionistic, fails to address other factors such as genetics and childhood
experiences.





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