The potential relationship between psychosis and violence

Source Citation

Purpose/Problem

Design/sample

Instruments/Measures

Results

Strengths/Weakness

Douglas, K. S., Guy, L. S., & Hart, S. D. (2009). Psychosis as a risk factor for violence to others: a meta-analysis. Psychological bulletin, 135(5), 679.

Following the extensive debate of the potential relationship between psychosis and violence, the articles reports on a research to establish the association between psychosis due to certain conditions such as schizophrenia and violence.

The authors adopted a qualitative design of a meta-analysis where they collected 885 effect sizes and calculated them from 204 courses on the basis of 166 independent sets of data.

Used descriptive analysis to divide the many groups of data while comparing them to others.
Used study groups to examine dispersion between effect sizes through moderation analyses.

The median of the calculation showed that psychosis and other mental disorders were responsible for a 46% to 68% increase in violence.

Strengths.
Offered a broad and clear explanation and discussion of the findings.
Gave correct account of past research findings.
Weakness.
No discussion of the assumptions made during the survey and the possibility that the study design may have altered the results.

Fazel, S., Gulati, G., Linsell, L., Geddes, J., & Grann, M. (2018). Schizophrenia and
Violence: Systematic Review and Meta-Analysis. Plus Medicine, 6(8), e1000120. DOI: 10.1371/journal.pmed.1000120

The article examines the relationship between violence and schizophrenia and other psychoses and the possibility that there may be other causes of the heterogeneity that may not have been captured by the books and articles on the topic.

It is a systematic review of analyses and investigations that were performed on the association between violence and schizophrenia and other psychoses.
Random-effects models were used in the meta-analysis to pool the odds ratios of the findings.

Used bibliographic databases and reference lists as well as secondary research of written journals from 1970 to 2009. The studied texts are reports on the issue of violence caused by patients with schizophrenia and other psychoses on the community and the general public.

In men, comparing the odds ratios violence from those suffering from schizophrenia and other psychoses ranged from 1 to 7.
In women, the odds ratios ranged from 4 to 29.
The impact of comorbid drug and alcohol abuse yielded a positive 95% possibility of violence.

Strengths.
Use of many figures and tables to present the data in the methodology and the assessment section.
There is an extended section of additional supporting information.

Junginger, J. (2016). Psychosis and Violence: The Case for a Content Analysis of Psychotic
Experience. Schizophrenia Bulletin, 22(1), 91-103. DOI: 10.1093/schbul/22.1.91

To explore the association between mental illness and violence and the threat that patients suffering from psychotic episodes pose to the general population.

A structured case study that reviews 56 articles published between 1967 and 1994 on the st...