In what the DSM-5 terms "shared psychotic disorder," one person in a close relationship induces the same delusion in his or her partner.This unusual delusion is known as

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The unusual delusion described in which one person in a close relationship induces the same delusion in his or her partner is known as folie à deux, which is also termed shared psychotic disorder. This disorder is defined by the DSM-5 as a situation in which two or more people who have a close relationship share the same delusional beliefs. Therefore, option B is the correct answer. Option A is incorrect because bipolar disorder is characterized by episodes of mania and depression. Option C is incorrect because dissociative identity disorder, also known as multiple personality disorder, is characterized by the presence of two or more distinct personality states. Option D is incorrect because undifferentiated schizophrenia is a subtype of schizophrenia characterized by mixed symptoms of different subtypes.

In What the DSM-5 Terms "Shared Psychotic Disorder," One Person