Delusional misidentification syndromes

  • The Capgras delusion is the belief that (usually) a close relative or spouse has been replaced by an identical-looking impostor.
  • The Fregoli delusion is the belief that various people the believer meets are actually the same person in disguise.
  • Intermetamorphosis is the belief that people in the environment swap identities with each other whilst maintaining the same appearance.
  • Subjective doubles, in which a person believes there is a doppelgänger or double of him or herself carrying out independent actions.