As a prelude to articles published in this special issue, I sketch changing historiographical conventions regarding the 'occult' in recent history of science and medicine scholarship. Next, a review of standard claims regarding psychical research and parapsychology in philosophical discussions of the demarcation problem reveals that these have tended to disregard basic primary sources and instead rely heavily on problematic popular accounts, simplistic notions of scientific practice, and outdated teleological historiographies of progress. I conclude by suggesting that rigorous and sensitively contextualized case studies of past elite heterodox scientists may be potentially useful to enrich historical and philosophical scholarship by highlighting epistemologies that have fallen through the crude meshes of triumphalist and postmodernist historiographical generalizations alike.

Largely unacknowledged by historians of the human sciences, late-19th-century psychical researchers were actively involved in the making of fledgling academic psychology. Moreover, with few exceptions historians have failed to discuss the wider implications of the fact that the founder of academic psychology in America, William James, considered himself a psychical researcher and sought to integrate the scientific study of mediumship, telepathy and other controversial topics into the nascent discipline. Analysing the celebrated exposure of the medium Eusapia Palladino by German-born Harvard psychologist Hugo Münsterberg as a representative example, this article discusses strategies employed by psychologists in the United States to expel psychical research from the agenda of scientific psychology. It is argued that the traditional historiography of psychical research, dominated by accounts deeply averse to its very subject matter, has been part of an ongoing form of ‘boundary-work’ to bolster the scientific status of psychology.

Shortly after the death of Albert von Schrenck-Notzing (1862-1929, the doyen of early twentieth century German para psychology, his former colleague in hypnotism and sexology Albert Moll (1862-1939) published a treatise on the psychology and pathology of parapsychologists, with Schrenck-Notzing serving as a prototype of a scientist suffering from an 'occult complex'. Moll's analysis concluded that parapsychologists vouching for the reality of supernormal phenomena, such as telepathy, clairvoyance, telekinesis and materialisations, suffered from a morbid will to believe, which paralysed their critical faculties and made them cover obvious mediumistic fraud. Using Moll's treatment of Schrenck-Notzing as an historical case study of boundary disputes in science and medicine, this essay traces the career of Schrenck-Notzing as a researcher in hypnotism, sexology and parapsychology; discusses the relationship between Moll and Schrenck-Notzing; and problematises the pathologisation and defamation strategies of deviant epistemologies by authors such as Moll.

El artículo confronta los eslóganes bien conocidos de ‘Dios ha muerto’ y ‘Dionisos contra el crucificado’ y pregunta por qué trata de nuevo del problema del Cristianismo (particularmente en El Anticristo) , aunque él ya había establecido en general su rechazo del teísmo a comienzos de 1880. El artículo muestra  que no era suficiente para la transvaloración proyectada de Nietzsche quedarse dentro de los límites de crítica general de religión. En cambio, la religión ‘positiva’ concreta tenía que ser reemplazada. Esto era una nueva manera del escepticismo experimental de Nietzsche

This paper traces the formation of the German “Gesellschaft für psychologische Forschung” (“Society for Psychological Research”), whose constitutive branches in Munich and Berlin were originally founded as inlets for alternatives to Wundtian experimental psychology from France and England, that is, experimental researches into hypnotism and alleged supernormal phenomena. By utilizing the career trajectories of Max Dessoir and Albert von Schrenck-Notzing as founding members of the “Gesellschaft,” this paper aims to open up novel perspectives regarding extra-scientific factors involved in historically determining the epistemological and methodological boundaries of nascent psychology in Germany.