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Updated: Jul 11, 2026

The Resident-intruder Paradigm: A Standardized Test for Aggression, Violence and Social Stress
Published on: July 4, 2013
Aggressive behaviour, victimization and crime among severely mentally ill patients requiring hospitalisation
Sheilagh Hodgins1, Jane Alderton, Adrian Cree
1Department of Forensic Mental Health Science, Institute of Psychiatry, Box PO 23, De Crespigny Park, Denmark Hill, London SE5 8AF, UK. s.hodgins@iop.kcl.ac.uk
Background:
Severe mental illness is associated with increased risk of aggressive behaviour, crime and victimization. Mental health policy does not acknowledge this evidence. The number of forensic beds has risen dramatically.
Aims:
To examine the prevalence of aggressive behaviour, victimization and criminality among people receiving in-patient treatment for severe mental illness in an inner-city area.
Method:
Self-reports of aggressive behaviour and victimization and criminal records were collected for 205 in-patients with severe mental illness.
Results:
In the preceding 6 months 49% of the men and 39% of the women had engaged in aggressive behaviour and 57% of the men and 48% of the women had been victims of assault; 47% of the men and 17% of the women had been convicted of at least one violent crime.
Conclusions:
Aggressive behaviour and victimization are common among severely mentally ill people requiring hospitalisation in the inner city. Rates of violent crime are higher than in the general population.
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