We critically reviewed the protocols, results, and potential implications from empirical studies ( n = 44) on mirror-gazing (including the “psychomanteum”) and eye-to-eye gazing, both in healthy individuals and clinical patients, including studies of hypnotic mirrored self-misidentification, mirror-gazing in body dysmorphic disorder and schizophrenia. We found these methods to be effective for eliciting altered states or anomalous experiences under controlled conditions and in non-clinical samples. Mirror-gazing and eye-to-eye-gazing produced anomalous experiences almost exclusively in the visual, bodily, and self-identity modalities, whereas psychomanteum experiences tended also to involve voices, smells, and bodily touches. The complexity, diversity, and specificity in contents across these anomalous experiences suggest mechanisms beyond perceptual distortions or illusions. We argue that mirror- and eye-gazing anomalous perceptions implicate different mechanisms that induce (i) Derealization (anomalous perceptions of external reality); (ii) Depersonalization (anomalous perceptions of the body), and (iii) Dissociated identity (anomalous perceptions of another identity in place of the self in mirror-gazing or in place of the other in eye-to-eye gazing). These interpretations suggest directions for future researches.
Mirror- and Eye-Gazing: An Integrative Review of Induced Altered and Anomalous Experiences
