This is a paper recently published in Frontiers in Humans Neuroscience by Davide Rivolta and colleagues.
Here we recreated the mirror-self misidentification delusion using hypnosis. Details follow:
Mirrored-self misidentification delusion is the belief that one’s reflection in the mirror is not oneself.
We used hypnotic suggestion to impair normal face processing in healthy participants and recreate key aspects of the delusion in the laboratory.
Twenty-two high hypnotisable participants received a hypnotic induction and a suggestion for either impaired (i) self-face recognition or (ii) impaired recognition of all faces. Participants were tested on their ability to recognize themselves in a mirror and other visual media – including a photograph, live video, and handheld mirror – and their ability to recognize other people, including the experimenter and famous faces.
Both suggestions produced impaired self-face recognition and recreated key aspects of the delusion. However, only the suggestion for impaired other-face recognition disrupted recognition of other faces.
The findings confirm that hypnotic suggestion can disrupt face processing and recreate features of mirrored-self misidentification. The variability seen in participants’ responses also corresponds to the heterogeneity seen in clinical patients.
Link to paper: http://journal.frontiersin.org/Journal/10.3389/fnhum.2014.00361/abstract
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