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The Theories of the Causes of Psychosis


What makes some people more vulnerable than others?

Inborn vulnerability

Such as a genetic predisposition (Kendler & Diehl, 1993)

Acquired vulnerability

Specific to individual life experience.

Can include: specific disease, such as differences in brain structure (Scharma & Chitnis, 2000); perinatal complications (such as viral infections) (Mednick et al, 1988); stressful family experiences, bereavement, sexual abuse and other previous life events (Allen, 2000).

The theories of the causes of psychosis

Personality Traits



Important Life events


Early Experiences



Social Isolation

Genetic Disposition



Physical Diseases


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