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Classification of Illness01:17

Classification of Illness

The meaning of illness is individualized to each person who experiences an alteration in health. In contrast, disease is a medical term indicating a pathological change in the structure and function of the body or mind. It is a condition that has specific symptoms and boundaries.
An illness is a response to a disease in which the person's level of functioning is changed compared with a previous level. The general classification of illness includes acute and chronic.
Acute illness is severe and...
Theoretical Approaches to Psychological Disorder01:29

Theoretical Approaches to Psychological Disorder

The development of psychological disorders, which are characterized by deviant, maladaptive, and personally distressing behaviors, has been explored through several theoretical approaches.
Biological approach
The biological approach posits that internal, organic factors are the primary causes of such disorders. This perspective emphasizes brain structure and function, genetic predispositions, and neurotransmitter imbalances. For example, schizophrenia has been associated with both genetic...
Positive Symptoms of Schizophrenia: Hallucinations and Delusions01:30

Positive Symptoms of Schizophrenia: Hallucinations and Delusions

Schizophrenia is a complex mental health disorder that can manifest with various positive symptoms, including thought, movement, and behavior disorders. These symptoms significantly disrupt cognitive and motor functions, leading to profound effects on an individual's ability to engage with the world.
Thought Disorders
Disorganized and unusual thought processes mark thought disorders in schizophrenia. One key feature is disorganized speech, where an individual's conversation includes loosely...
Introduction to Psychological Disorders01:19

Introduction to Psychological Disorders

Abnormal behavior, often referred to as mental illness, results from changes in brain function that influence thought patterns, behaviors, and social interactions. Psychologists and psychiatrists typically assess abnormal behavior using three primary criteria: deviance, maladaptation, and personal distress, particularly when these traits persist over long periods.
Deviant Behavior
Deviance in behavior refers to actions or thought patterns that significantly diverge from societal norms or...
Models of Health Promotion and Illness Prevention II01:18

Models of Health Promotion and Illness Prevention II

The person's health status fluctuates continually, varying from being in good health to becoming ill and returning to being healthy. To understand the concept of illness prevention, there are two models. First, the health-illness continuum model is a graphic representation of an individual's wellness. It states that a person is considered healthy in the absence of physical disease and the presence of good emotional health.
The agent-host-environment model states that disease results from...
Personality Disorders: Paranoid and Schizoid01:22

Personality 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...

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Related Experiment Video

Updated: May 14, 2026

Signal Attenuation as a Rat Model of Obsessive Compulsive Disorder
09:29

Signal Attenuation as a Rat Model of Obsessive Compulsive Disorder

Published on: January 9, 2015

Somatic symptom disorders and illness behaviour: current perspectives.

Kirsty N Prior1, Malcolm J Bond

  • 1School of Medicine, Flinders University, Adelaide, South Australia, Australia.

International Review of Psychiatry (Abingdon, England)
|February 7, 2013
PubMed
Summary
This summary is machine-generated.

Research on behavioral aspects of somatic symptom disorders is limited. This paper explores illness behavior frameworks, measurement tools, and recommends future research on adaptive behaviors to mitigate disorder risk and impact.

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Last Updated: May 14, 2026

Signal Attenuation as a Rat Model of Obsessive Compulsive Disorder
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Published on: December 24, 2013

Area of Science:

  • Psychology
  • Sociology
  • Behavioral Medicine

Background:

  • Somatic symptom disorders (SSDs) are often studied without sufficient attention to behavioral responses.
  • Understanding illness behavior is crucial for a comprehensive approach to SSDs.

Purpose of the Study:

  • To review theoretical perspectives on illness behavior in the context of SSDs.
  • To examine methods for operationalizing and measuring illness behavior.
  • To propose future research directions for understanding behavioral characteristics in SSDs.

Main Methods:

  • Literature review of sociological and cognitive-behavioral theories.
  • Discussion of established and contemporary instruments for measuring illness behavior, including the Illness Behavior Questionnaire.
  • Analysis of state- versus trait-based behavioral characteristics.

Main Results:

  • Illness behavior provides a framework for understanding psychosocial factors in SSDs.
  • Various instruments exist to measure overt and covert illness behaviors.
  • Distinguishing between state- and trait-based illness behavior is key for future research.

Conclusions:

  • Adaptive behaviors like self-management and coping may prevent SSD development or reduce negative psychosocial outcomes.
  • Further research is needed to understand the nuances of illness behavior in SSDs.
  • Integrating behavioral perspectives is essential for effective SSD management.