Stress hypothesis
Stress hypothesis or diathesis stress hypothesis or the diathesis–stress model or the vulnerability–stress model, is a psychological theory or model which makes an attempt to understand the trajectory certain disorder, or thus explain its occurrence, as with respect to its interaction with the predispositional vulnerability, the diathesis, and a stressful situation which most of the time caused by life experiences. The diathesis, or predisposition of a disorder, is has been observed to actively interacts with the individual's stress response. Stress is experienced when a life event or series of events that interferes with a person's psychological equilibrium, prior plans, motivation and leads in catalysis of the development of a disorder. Thus the objective of diathesis–stress model is to explore the biological or genetic traits (diatheses) effect’s interaction with environmental influences (stressors). this can be taken as a fundamental cause of neurotic disorders like depression, anxiety, or schizophrenia similar disorder. The model of diathesis–stress have come to suggest, if the combined effect of the predisposing factor and the stress is found to exceeds the threshold, the person is likely to develop a specific disorder.