Related Experiment Video
Updated: Jul 19, 2026
09:12
The Resident-intruder Paradigm: A Standardized Test for Aggression, Violence and Social Stress
Published on: July 4, 2013
Aggressive behaviour at first contact with services: findings from the AESOP First Episode Psychosis Study
Psychological Medicine
|October 5, 2006
Summary
Aggressive behavior is common in first episode psychosis, particularly with mania. Factors like younger age, ethnicity, and prior offenses are linked to aggression, with violence associated with male gender and social class.
Area of Science:
- Psychiatry
- Clinical Psychology
Background:
- Aggressive behavior is more prevalent in schizophrenia than affective psychoses.
- Limited data exists on aggression at the onset of psychosis.
Purpose of the Study:
- To examine reasons for service presentation in first episode psychosis.
- To determine the prevalence and characteristics of aggressive behavior at psychosis onset.
Main Methods:
- Recruited individuals for a UK-based first episode psychosis study.
- Compared aggressive patients to non-aggressive patients on various factors.
- Differentiated physically violent from non-violent aggressive patients.
Main Results:
- Nearly 40% of patients exhibited aggression at first contact; half were physically violent.
- Younger age, African-Caribbean ethnicity, and prior violent offenses predicted aggression.
- Mania diagnosis and manic symptoms were associated with aggression in the overall sample and schizophrenia subgroup.
Conclusions:
- Aggression is a frequent occurrence in first episode psychosis.
- Sociodemographic factors and prior offending correlate with aggression and violence severity.
- Manic diagnoses and symptoms are linked to aggressive behavior.
Related Concept Videos
01:47Aggression
Humans engage in aggression when they seek to cause harm or pain to another person. Aggression takes two forms depending on one’s motives: hostile or instrumental. Hostile aggression is motivated by feelings of anger with intent to cause pain; a fight in a bar with a stranger is an example of hostile aggression. In contrast, instrumental aggression is motivated by achieving a goal and does not necessarily involve intent to cause pain (Berkowitz, 1993); a contract killer who murders for hire...
01:19Autism Spectrum Disorder
Autism spectrum disorder (ASD) is a neurodevelopmental condition marked by persistent deficits in social communication and interaction alongside restrictive and repetitive behaviors or interests. ASD is sometimes accompanied by intellectual impairment.
These core symptoms manifest differently among individuals, ranging from mild to severe. The disorder's complexity extends beyond its clinical presentation, encompassing a diverse range of biological, cognitive, and sociocultural influences.
These core symptoms manifest differently among individuals, ranging from mild to severe. The disorder's complexity extends beyond its clinical presentation, encompassing a diverse range of biological, cognitive, and sociocultural influences.
01:24Antisocial Personality Disorder
Antisocial personality disorder is a chronic mental health condition characterized by persistent patterns of disregard for the rights and well-being of others. Individuals with antisocial personality disorder exhibit behaviors that include deceitfulness, impulsivity, irresponsibility, aggression, and a profound lack of empathy. These traits often manifest early in life and persist into adulthood, leading to significant personal, social, and legal consequences.
Behavioral Characteristics and...
Behavioral Characteristics and...
01:22Personality Disorders: Paranoid and Schizoid
Personality disorders represent enduring cognition, affect, and behavior patterns that significantly deviate from societal norms. These maladaptive traits often lead to difficulties in various domains, including interpersonal relationships, occupational settings, and overall psychological well-being. Paranoid personality disorder and schizoid personality disorder are two distinct conditions marked by odd or eccentric behavior.
Paranoid Personality Disorder
Paranoid personality disorder is...
Paranoid Personality Disorder
Paranoid personality disorder is...
01:28Conduct Disorder
Conduct disorder is a complex mental health diagnosis characterized by a repetitive and persistent pattern of behavior that violates societal norms, the rights of others, or age-appropriate rules. The diagnostic criteria for conduct disorder require the presence of at least three problematic behaviors within the past 12 months, with at least one occurring in the past six months. These behaviors are grouped into four categories: aggression toward people and animals; destruction of property;...
01:14Piaget's Stage 1 of Cognitive Development
The sensorimotor stage, the initial phase of Jean Piaget's theory of cognitive development, spans the first two years of a child's life. During this period, infants actively engage with their surroundings, building cognitive awareness through direct interaction with the world. This interaction is primarily based on sensory perception and motor actions, allowing infants to gradually understand basic physical properties and predict how objects interact within their environment.
Exploration...
Exploration...