heritability is the proportion of a behaviour that is due to genetic factors
they believe genes have an effect on the brain which creates brain dysfunction
prefrontal cortex -underactive in criminals, it is the part of the brain were humans associate fear and anti-social behaviour. limbic system - increased activity in criminals, controls aggressive and sexual behaviour. corpus callosum - less activity in criminals, it is the bridge between rational and irrational behaviour. Temporal Lobe - slower in aggresive psychopaths, it controls the language,learning and emotions in individuals.
believe all criminals have the similar facial features such as:
asymmetrical faces, high cheekbones, strong jaws, fleshy lips, lots of hair.
criticisms of this theory are
- there can not be one criminal gene for all behaviours
- brain dysfunction only evident in some criminals
-criminals having different set features not supported by enough evidence.
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