Related Experiment Video
Updated: Aug 11, 2026

The Resident-intruder Paradigm: A Standardized Test for Aggression, Violence and Social Stress
Published on: July 4, 2013
School violence reduction: a model Jamaican secondary school program
1American International College and Community Services Institute, Springfield, MA 01103, USA.
Abstract:
Violence in United States' schools is epidemic. Solutions are rare. Community mental health centers are now being challenged to become part of the solution. The Montego Bay Secondary School project presents an example of how violence reduction can be achieved using almost no physical resources and the special effect, called the "Bruno Effect", created by one Jamaican police officer with the consultation of a psychodynamically-led training and intervention team. The "Bruno Effect" resulted in a dramatic reduction in the number of physical attacks from an observed 5 fights per day (3 out of the 5 involved knives and cutting) to 1 per week. The violence rate returned immediately to its former level as soon as "Bruno" left the school. The dramatic violence reduction appears related to establishing an adult protective shield. Results stem from the unique personality of the adult protector, as well as a combination of the special role of the police and the outside intervention team.
Related Concept Videos
Bullying
Models of Health Promotion and Illness Prevention II
The agent-host-environment model states that disease results from...
Stress Prevention and Stress Management Techniques II
Type A Personality: Driven and Easily Stressed
Individuals with Type A personalities are often highly competitive and ambitious and operate with a strong sense of urgency. Commonly labeled as "workaholics," they...
Stress Prevention and Stress Management Techniques III
The Role of Exercise in Stress Management
Regular physical activity is essential for reducing stress and promoting cardiovascular health. Exercise strengthens the heart, enhances blood flow, keeps blood vessels flexible, and helps lower blood pressure, all of which reduce the body's stress response. Research shows that adults who exercise regularly have nearly half the risk...
Community Based Intervention
Foundations of Community Mental Health Programs
Central to the success of community-based interventions is the...
Self-Regulation

