Narcissistic Personality Disorder Learning Center

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Narcissistic personality disorder

The cause of this disorder is unknown. Narcissistic personality disorder usually begins by early adulthood.

Source:ADAM

Date:October 17, 2008

Narcissistic personality disorder

At present there are two major theories about the origin and nature of NPD. One theory regards NPD as a form of arrested psychological development while the other regards it as a young child's defense against psychological pain. The two perspectiv...

Source:Gale Encyclopedia of Mental Disorders

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