diathesis-stress model

The diathesis-stress model is a psychological theory that explains behaviour as both a result of biological and genetic factors ("nature"), and life experiences ("nurture"). This theory is often used to describe the pronunciation of mental disorders, like schizophrenia, that are produced by the interaction of a vulnerable hereditary predisposition, with precipitating events in the environment. This theory was originally introduced as a means to explain some of the causes of schizophrenia (Zubin & Spring, 1977).
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