David R. Lyon

• PhD
• Instructor at Kwantlen Polytechnic University

School-based violence remains an important and developing area of inquiry in the violence risk prevention and threat assessment fields. In particular, teacher-directed violence has been a growing concern and numerous empirical studies have examined the prevalence of and implications associated with such acts (e.g., Dinkes et al., 2009; Reddy et al....

This book provides an introduction to psychological theories of criminal and violent behaviour.

International research has established that stalking is a prevalent problem with serious and often life-threatening consequences for victims. Stalking is also a unique form of violence due to its nature and diversity, making it difficult for criminal justice and health professionals to establish which perpetrators and victims have the greatest need...

Data collected from 731 teachers were used to examine the consequences of violence directed toward teachers while in the workplace. Analyses showed that the majority of respondents (n = 585, 80.0%) had experienced school-related violence—broadly defined—at one point in their careers. Serious violence (actual, attempted, or threatened physical viole...

IntroductionReview Of Legal And Scientific IssuesEffective Management Of StalkersCase Study Grudge StalkingConclusionNOTEReferences

In conclusion, we have attempted to illustrate how the area of risk assessment has made significant advances in the last 15 years. As the field moved from an emphasis on the prediction of violence and identification of “dangerous” persons to a risk assessment model, application of new research approaches led to optimism that improvements in evaluat...

Risk assessment of stalkers is difficult due to the diversity of stalking-related behaviors and the lack of research. The authors discuss three problems. First, stalking is a form of targeted violence, that is, violence directed at specific people known to the perpetrator. Second, stalking may include acts that are implicitly or indirectly threaten...

In this chapter, the authors focus on risk assessment as it relates to violence. The authors begin with a brief examination of some conceptual issues surrounding the study of violence and its prevalence in Canadian society. Next, a review of a few of the junctures within the Canadian legal context where risk assessments occur and some of the method...

It is noteworthy that the title of the NATO ASI from which this book emerged was “Psychopathy: Theory, Research, and Implications for Society.” As the other chapters make clear, over the course of 10 days there was much discussion of theory and research concerning psychopathy. While some of the presentations and discussions addressed the behavior o...

Although courts in the United States and Canada regularly admit graphic photographs into evidence, little research exists on whether such evidence prejudices the decisions of jurors. Mock jurors (N = 120) read a detailed trial transcript of a murder trial, and were either presented with color, black and white, or no photographs of an actual murder...