Journal of Scientifi c Exploration, Vol. 34, No. 3, pp. 537–596, 2020 0892-3310/20 HISTORICAL PERSPECTIVE Dissociation and the Unconscious Mind: Nineteenth-Century Perspectives on Mediumship C!"#$% S. A#&!"!'$ Parapsychology Foundation
[email protected] Submitted December 18, 2019; Accepted March 21, 2020; Published September 15, 2020 https://doi.org/10.31275/20201735 Creative Commons License CC-BY-NC Abstract—There is a long history of discussions of mediumship as related to dissociation and the unconscious mind during the nineteenth century. A! er an overview of relevant ideas and observations from the mesmeric, hypnosis, and spiritualistic literatures, I focus on the writings of Jules Baillarger, Alfred Binet, Paul Blocq, Théodore Flournoy, Jules Héricourt, William James, Pierre Janet, Ambroise August Liébeault, Frederic W. H. Myers, Julian Ochorowicz, Charles Richet, Hippolyte Taine, Paul Tascher, and Edouard von Hartmann. While some of their ideas reduced mediumship solely to intra-psychic processes, others considered as well veridical phenomena. The speculations of these individuals, involving personation, and di" erent memory states, were part of a general interest in the unconscious mind, and in automatisms, hysteria, and hypnosis during the period in question. Similar ideas continued into the twentieth century. Keywords: mediumship; dissociation; secondary personalities; Frederic W. H. Myers; Théodore Flournoy; Pierre Janet INTRODUCTION Dissociation, a process involving the disconnection of a sense of identity, physical sensations, and memory from conscious experience, has been related to mediumship due to the latter’s sensory and motor automatism and changes of identity. In recent years there have been some conceptual discussions of dissociation and mediumship (e.g., Maraldi et al., 2019) as well as empirical studies exploring their 538 Carlos S.