Perspectives on Psychological Disorders: Diathesis-Stress and Biopsychosocial Models

Perspectives on Psychological Disorders

Diathesis-Stress Model

The diathesis-stress model is a widely used framework in psychology to explain the development of psychological disorders. It posits that individuals possess an internal vulnerability (diathesis) for a disorder, but the disorder only manifests when triggered by environmental stressors.

• Diathesis: An underlying predisposition or vulnerability to a disorder, which may be biological, psychological, or environmental in origin.

• Stress: External events or conditions that challenge an individual's ability to cope, potentially triggering the onset of a disorder in those with a diathesis.

Key Points:

• The disorder does not appear unless both diathesis and stress are present.

• Diathesis can be genetic, neurobiological, or result from early life experiences.

• Stressors can include trauma, major life changes, or ongoing adversity.

Examples of Diathesis:

• Genetic neurological development

• Cognitive biases

• Adverse childhood experiences

Examples of Stress:

• Trauma (physical, sexual, etc.)

• Loss (death, home, etc.)

• Pressure from work/school

Graphical Representation:

• Individuals with a diathesis show increased risk for disorder only when exposed to high stress.

• Populations look the same under low stress; split occurs under high stress conditions.

Note: While there is strong evidence supporting this model, it is important to remember that no single model can explain all psychological disorders.

Biopsychosocial Model

The biopsychosocial model offers a holistic perspective, explaining psychological disorders as a combination of biological, psychological, and social factors. This model recognizes the complexity and individuality of mental health conditions.

• Biological factors: Genetics, neurochemistry, brain structure, and development.

• Psychological factors: Cognition, emotion, temperament, learning, and personality.

• Social factors: Stressors, environment, culture, and social support.

Key Points:

• The same disorder can have different causes across individuals.

• Effective treatment often requires a combination of approaches, including pharmacological, therapeutic, and community support interventions.

Example: For anxiety, biological factors may include genetic predisposition, psychological factors may involve cognitive biases toward negative thinking, and social factors may include lack of social support.

Table: Factors in the Biopsychosocial Model

Factor	Example
Biological	Genetic predisposition for anxiety
Psychological	Cognitive bias towards negative thinking
Social	Away from family, lack of social support

Strengths of the Biopsychosocial Perspective

• Highlights the impact of stress in bringing about mental disorders.

• Recognizes the cultural context of psychopathology, allowing for a nuanced understanding of how culture shapes mental health.

• Provides a holistic explanation for psychological disorders, demonstrating how disorders can have different causes across individuals.

Additional info: The biopsychosocial model is widely used in clinical psychology and psychiatry to guide assessment and treatment planning, emphasizing the need for individualized care.