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Dive into the research topics where Grant T. Harris is active.

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Featured researches published by Grant T. Harris.


Proceedings of the Royal Society of London B: Biological Sciences | 1999

Birth order and fluctuating asymmetry: a first look

Martin L. Lalumière; Grant T. Harris; Marnie E. Rice

We investigated the hypothesis that maternal immunoreactivity to male–specific features of the foetus can increase developmental instability. We predicted that the participants number of older brothers would be positively related to the fluctuating asymmetry of ten bilateral morphological traits. The participants were 40 adult male psychiatric patients and 31 adult male hospital employees. Consistent with the hypothesis, the participants number of older brothers–but not number of older sisters, younger brothers or younger sisters–was positively associated with fluctuating asymmetry. The patients had significantly larger fluctuating asymmetry scores and tended to have more older brothers than the employees, but the positive relationship between the number of older brothers and fluctuating asymmetry was observed in both groups.


Behavioral Sciences & The Law | 2015

Evidence for risk estimate precision: implications for individual risk communication.

Grant T. Harris; Christopher T. Lowenkamp; N. Zoe Hilton

Actuarial risk assessment instruments using well-established predictor variables measured at the individual level (e.g., age, criminal history, psychopathy) discriminate well between recidivists and non-recidivists across diverse samples. Data indicating the relative risk of recidivism can inform policy decisions about allocating resources according to risk within a correctional system, consistent with the first of the risk-need-responsivity (RNR) principles. Evidence for the precision of absolute risk as applied to an individual based on scores from many samples, however, has proven challenging. In this paper, we present a study examining the association of actuarial risk estimate precision with sample size using the Post Conviction Risk Assessment (PCRA; Lowenkamp et al., 2013), in samples of up to 26,642 offenders. Results indicate that the precision of individual estimates can be demonstrated with sufficient sample size. We believe that the implications of absolute risk for the communication of an individual offenders risks have been poorly understood. We argue that the purpose of individual-level risk communication is to ensure the effective application of policy, which requires matching a new case to aggregate data. We illustrate how an offenders risk might thus be communicated, and conclude that this function is distinct from management of an individuals criminogenic needs and identification of effective and suitable treatments.


Journal of Dual Diagnosis | 2013

Implementing Residential Integrated Treatment for Co-occurring Disorders.

Shari A. McKee; Grant T. Harris; Catherine A. Cormier

Objective: Much is now known about effective treatment for co-occurring substance abuse and psychiatric difficulties and many evidence-based practice recommendations have been disseminated. Implementation of these recommended interventions in daily clinical practice has been more of a struggle. This article describes successful implementation of integrated treatment for co-occurring disorders in a small residential program. Methods: A traditional 28-day addiction service was transformed into a 3-month integrated treatment program and 155 individuals with co-occurring disorders agreed to participate in its evaluation. The transformation entailed a completely new manualized service, training in a number of clinical interventions for all program clinicians, ongoing clinical supervision, and formal measurement of clients’ backgrounds, substance abuse, quality of life, mental health symptoms, self-esteem, and satisfaction with the program. We also obtained collateral informants’ reports on participants’ symptoms, substance use, and quality of life. Fidelity to the treatment model was continuously assessed, as were participants’ knowledge and skill acquisition. In addition, impact of the implementation on the program clinicians’ morale and attitudes toward evidence-based practices was assessed, as was staff turnover and per diem costs. Results: Despite very problematic clinical and sociodemographic histories, the 86 participants who completed the program showed clinically significant mental health symptom improvement, acquisition of knowledge and skill, and high self-esteem and satisfaction with the program. Program fidelity, clinician morale, commitment to the program, and attitudes toward evidence-based practice were uniformly high. These successes were achieved while maintaining the lowest per–inpatient day cost of all hospital inpatient units. Conclusions: The findings support the contention that evidence-based integrated treatment can be implemented with fidelity in regular clinical practice to the benefit of participants, staff, and the hospital. Our experience was that having a scientist-practitioner working as a staff member on the program to lead the implementation was a key element. Future reports will focus on longer-term follow-up of substance use and quality of life outcomes.


Archive | 1994

The Violent Patient

Grant T. Harris; Marnie E. Rice

One of the most worrisome parts of any mental health clinician’s job is the fear that a client will be violent. Clinicians often bear special legal responsibility and authority to detect those people (among their clientele) who present a risk of imminent violence and to prevent it through treatment or incapacitation. There is also often public outrage when psychiatric patients or ex-patients commit seriously violent acts, and a large share of that outrage is often directed toward clinicians who treated the client. The outrage is based on an assumption that if a client hurts some innocent person, the clinician must have been negligent in failing to notice the danger, failing to provide treatment, or failing to have or keep the dangerous client locked up.


The Canadian Journal of Psychiatry | 2015

Weight Gain and Its Correlates Among Forensic Inpatients

N. Zoe Hilton; Elke Ham; Carol Lang; Grant T. Harris

Objective: We investigated changes in weight, body mass index (BMI), and other indices of the metabolic syndrome in forensic inpatients. Weight gain associated with newer antipsychotics (APs) is well established in the general psychiatric population. Methods: We examined the medical records of 291 men admitted to a forensic hospital at admission and again at discharge or 365 days later if still in hospital. We also recorded diagnosis and smoker status on admission and quantified psychotropic treatment and adherence, physical activity, and daytime occupation during the hospitalization. Results: On admission, 33% were obese and 22% of the 106 patients for whom sufficient data were available met criteria for metabolic syndrome. Among patients staying at least 30 days, 60% were weighed again before discharge but repeated blood pressure and waist circumference measures were uncommon, even among those at greatest risk. The 122 forensic inpatients with sufficient information gained an average of 12% of their body weight and 40% increased by at least 1 BMI category, gaining an average of 3.67 kg per month. Weight gain was associated with duration of time and was not attributable to being underweight on admission, diagnosis of schizophrenia, atypical AP treatment, medication adherence, or having been a smoker. Conclusions: Patients gained weight during forensic hospitalization independent of medication use. We recommend further research using consistent measurement and wider sampling of both metabolic syndrome indicators and its individual and systemic causes in forensic populations.


Archive | 1994

The violence prediction scheme: Assessing dangerousness in high risk men.

Christopher D. Webster; Grant T. Harris; Marnie E. Rice; Catherine A. Cormier; Vernon L. Quinsey


Sexual Abuse: A Journal of Research and Treatment | 2003

Men in His Category Have a 50% Likelihood, But Which Half Is He In? Comments on Berlin, Galbreath, Geary, and McGlone

Grant T. Harris


The Wiley-Blackwell Handbook of Legal and Ethical Aspects of Sex Offender Treatment and Management | 2013

Treatment for Adult Sex Offenders

Marnie E. Rice; Grant T. Harris


Archive | 2003

What we know and don't know about treating adult sex offenders.

Marnie E. Rice; Grant T. Harris


Archive | 2001

Research on the treatment of adult sex offenders.

Marnie E. Rice; Grant T. Harris; Vernon L. Quinsey

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Marnie E. Rice

Centre for Mental Health

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Marnie E. Rice

Centre for Mental Health

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