“…Several articles and books have been published on the effects of early parapsychology (e.g., Evrard, 2016;Monroe, 2008;Wolffram, 2009), psychical (e.g., Lachapelle, 2011;Oppenheim, 1988;Sommer, 2012), and metaphysical (e.g., Gyimesi, 2016c;Méheust, 1999) research. It has been demonstrated that theories connected to animal magnetism and somnambulism proved significant antecedents to modern hypnosis research (e.g., Crabtree, 1993;Ellenberger, 1970;Gauld, 1992;Gyimesi, 2021;Méheust, 1999). It has been shown that early representatives of psychical research and parapsychology contributed to the investigation of altered states of consciousness, dreams, subliminal sensations, and suggestion (see Gyimesi, 2016bGyimesi, , 2016cMonroe, 2008;Plas, 2000).…”