Cognitive-affective drivers of fixation in threat assessment.

Pathological fixation - preoccupation with a person or a cause that is accompanied by deterioration in social and occupational functioning - has been found to precede most cases of targeted violence. It is clinically observed and theorized to have three different cognitive-affective drivers: delusion, obsession, or extreme overvalued belief. Each driver is explained, and case examples are provided in the context of threat assessment.

A Preliminary Report of Psychiatric Diagnoses in a Scottish County Sample of Persons of National Security Concern.

Increasing anecdotal, empirical, and research evidence indicates mental disorder history is one of the several factors associated with increased risk of involvement in lone-actor terrorist activities. Currently, few studies have been conducted on the mental disorder histories of individuals assessed as at risk of involvement in terrorist activities (Meloy, J Threat Assess Manag 2019;6:93). This pilot study describes demographic, psychiatric, and criminal characteristics of a sample of Scottish individuals identified by the Prevent element of the U.

Extreme Overvalued Beliefs.

An extreme overvalued belief is shared by others in a person's cultural, religious, or subcultural group. The belief is often relished, amplified, and defended by the possessor of the belief and should be differentiated from a delusion or obsession. Over time, the belief grows more dominant, more refined, and more resistant to challenge.

Visualizing the relationship among indicators for lone actor terrorist attacks: Multidimensional scaling and the TRAP-18.

This validation study analyses data from a sample of North American terrorist attackers (n = 33) and non-attackers (n = 23) through the lens of the Terrorist Radicalization Assessment Protocol (TRAP-18; Meloy, 2017) utilizing a multivariate statistical approach - multidimensional scaling - to visualize potential clustering (co-occurrence) of risk factors. Rarely done in terrorism research, the results plotted in two-dimensional space show the clustering and co-occurrence of most of the eight proximal warning behaviors among the attackers, but not among the non-attackers, and less of a clustering and association of distal characteristics, but their presence in both attackers and non-attackers. These findings provide further empirical support for the rational-theoretical model of the TRAP-18, a structured professional judgment instrument for threat assessment of lone actor terrorists.

Extreme Overvalued Belief and the Legacy of Carl Wernicke.

Individuals with extreme overvalued beliefs often carry out abhorrent and inexplicable acts of violence. They hold odd and bizarre beliefs that are shared by others in their culture or subculture. This creates a dilemma for the forensic psychiatrist because the definition of delusion may not be adequate.