2. Symptoms

For someone to receive a diagnosis of dissociative identity disorder, he must meet several criteria. He must experience two or more personalities and there must be an identifiable change in behavior, memory, cognition, and motor function between the two. Most people experience long or short-term memory gaps much more severe than typical forgetfulness. The symptoms must also prevent the person from functioning normally in various aspects of their life.

Short Long Term Memory Loss fotografixx / Getty Images

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