To understand the factors that cause mental disorders, most psychologists use a biopsychosocial perspective.
These criteria are described in a 1,000-page manual known as the Diagnostic and Statistical Manual of Mental Disorders (DSM). This is a document that provides a common language and standard criteria for classifying mental disorders (American Psychiatric Association, 2013).
Although the causes of most mental disorders are not fully understood, researchers have identified a variety of biological, psychological, and environmental factors that may contribute to the development or progression of mental disorders.
Psychiatric disorders are generally conditions characterized by distress, disability, and/or atypical thoughts, feelings, and behavior.
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