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Concept
Diathesis–stress model
Summary
The diathesis-stress model, also known as the vulnerability–stress model, is a psychological theory that attempts to explain a disorder, or its trajectory, as the result of an interaction between a predispositional vulnerability, the diathesis, and stress caused by life experiences. The term diathesis derives from the Greek term (διάθεσις) for a predisposition or sensibility. A diathesis can take the form of genetic, psychological, biological, or situational factors. A large range of differences exists among individuals' vulnerabilities to the development of a disorder.
The diathesis, or predisposition, interacts with the individual's subsequent stress response. Stress is a life event or series of events that disrupt a person's psychological equilibrium and may catalyze the development of a disorder. Thus the diathesis-stress model serves to explore how biological or genetic traits (diatheses) interact with environmental influences (stressors) to produce disorders such as depression, anxiety, or schizophrenia. The diathesis-stress model asserts that if the combination of the predisposition and the stress exceeds a threshold, the person will develop a disorder.
The use of the term diathesis in medicine and in the specialty of psychiatry dates back to the 1800s. However, the diathesis-stress model was not introduced and used to describe the development of psychopathology until it was applied to explaining schizophrenia in the 1960s by Paul Meehl.
The diathesis-stress model is used in many fields of psychology, specifically for studying the development of psychopathology. It is useful for the purposes of understanding the interplay of nature and nurture in the susceptibility to psychological disorders throughout the lifespan. Diathesis-stress models can also assist in determining who will develop a disorder and who will not. For example, in the context of depression, the diathesis-stress model can help explain why Person A may become depressed while Person B does not, even when exposed to the same stressors.
Official source
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