Psychopathy
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Updated: Apr 23, 2026

Brain Morphology of Cannabis Users With or Without Psychosis: A Pilot MRI Study
Published on: August 18, 2020
Essi Viding1, Eamon McCrory2, Ana Seara-Cardoso2
1Division of Psychology and Language Sciences, University College London, 26 Bedford Way, London WC1H 0AL, UK; Institute of Cognitive Neuroscience, University College London, 17 Queen Square, London WC1N 3AR, UK.
Abstract:
Psychopathy is a condition that has long captured the public imagination. Newspaper column inches are devoted to murderers with psychopathic features and movies such as No Country for Old Men and We Need to Talk About Kevin focus on characters who are exceptionally cold and callous. Psychopathy is in fact a personality disorder characterised by lack of empathy and guilt, shallow affect, manipulation of other people and severe, premeditated and violent antisocial behaviour. Individuals with psychopathy generate substantial societal costs both as a direct financial consequence of their offending behaviour and lack of normal participation in working life, but also in terms of the emotional and psychological costs to their victims.
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