Jay Prakash Singh

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OBJECTIVE To investigate the predictive validity of tools commonly used to assess the risk of violence, sexual, and criminal behaviour. DESIGN Systematic review and tabular meta-analysis of replication studies following PRISMA guidelines. DATA SOURCES PsycINFO, Embase, Medline, and United States Criminal Justice Reference Service Abstracts. REVIEW(More)
We conducted a meta-analysis of studies examining the association between the Val158Met COMT polymorphism and violence against others in schizophrenia. A systematic search current to November 1, 2011 was conducted using MEDLINE, EMBASE, CINAHL, PsycINFO, ProQuest, and the National Criminal Justice Reference Service and identified 15 studies comprising 2,370(More)
There are a large number of structured instruments that assist in the assessment of antisocial, violent and sexual risk, and their use appears to be increasing in mental health and criminal justice settings. However, little is known about which commonly used instruments produce the highest rates of predictive validity, and whether overall rates of(More)
Clinical guidelines recommend that violence risk be assessed in schizophrenia. Current approaches are resource-intensive as they employ detailed clinical assessments of dangerousness for most patients. An alternative approach would be to first screen out patients at very low risk of future violence prior to more costly and time-consuming assessments. In(More)
Various financial and non-financial conflicts of interests have been shown to influence the reporting of research findings, particularly in clinical medicine. In this study, we examine whether this extends to prognostic instruments designed to assess violence risk. Such instruments have increasingly become a routine part of clinical practice in mental(More)
BACKGROUND Rates of violence in persons identified as high risk by structured risk assessment instruments (SRAIs) are uncertain and frequently unreported by validation studies. AIMS To analyse the variation in rates of violence in individuals identified as high risk by SRAIs. METHOD A systematic search of databases (1995-2011) was conducted for studies(More)
With the population of adults under correctional supervision in the United States at an all-time high, psychologists and other professionals working in U.S. correctional agencies face mounting pressures to identify offenders at greater risk of recidivism and to guide treatment and supervision recommendations. Risk assessment instruments are increasingly(More)
INTRODUCTION The performance of violence risk assessment instruments can be primarily investigated by analysing two psychometric properties: discrimination and calibration. Although many studies have examined the discrimination capacity of the Violence Risk Appraisal Guide (VRAG) and other actuarial risk assessment tools, few have evaluated how well(More)
(2013). Utility of a violence screening tool to predict recidivism in offenders with schizophrenia: A total forensic cohort study. Abstract The aim of the present study was to investigate the utility of the screening tool developed by Wootton and colleagues (2008) to predict recidivism in a total cohort of offenders diagnosed with schizophrenia-spectrum(More)