Dr. Heather is answering this very question using examples from the 1996 film, Primal Fear. In his film debut and Oscar nominated performance, Edward Norton portrays a murderer capable of convincing everyone around him he has Multiple Personality Disorder. Heather and Kristen break down the complexities of malingering and diagnosing the mental health condition, Dissociative Identity Disorder (having two or more identities).

Movie Clips

References:

Diagnostic and statistical manual of mental disorders: DSM-5. (2017). Arlington, VA: American Psychiatric Association.

Tracy, D., & Rix, K. (2017). Malingering mental disorders: Clinical assessment. BJPsych Advances, 23(1), 27-35. doi:10.1192/apt.bp.116.015958.

Detecting-Clinical-and-Simulated-Dissociative-Identity-Disorder-With-the-Test-of-Memory-Malingering.pdf (researchgate.net)

Dissociative Identity Disorder: A Pathophysiological Phenomenon (researchgate.net)