... likely to commit a crime. * Also low levels of serotonin have been linked with increased aggression levels. Studies have shown that people with history of crime have been linked with particularly low levels of this neurotransmitter. Also, a study showed that people with low levels of it have a reduced ability to control aggressive impulses. In addition it has been used as an effective pharmacological treatment in combating those who suffer form erratic aggression. * Third reason (abnormal brain structure and anatomy) have been linked as possible causes of aggression. Researchers have found significant differences in brain structure of mass murderers (reduced activity on both sides of amygadala and pre-frontal cortex) Evaluation: - Common problem with any attempt to explain any psychological behaviour using physiological causes - its too difficult to distinguish whether he differences are causes or symptoms of the aggression. Genetic Explanation These views of genetic essentialism claim that not only are physical ...

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