Léon Marillier and the veridical hallucination in late-nineteenth- and early-twentieth-century French psychology and psychopathology.

Recent research on the professionalization of psychology at the end of the nineteenth century shows how objects of knowledge which appear illegitimate to us today shaped the institutionalization of disciplines. The veridical or telepathic hallucination was one of these objects, constituting a field both of division and exchange between nascent psychology and disciplines known as 'psychic sciences' in France, and 'psychical research' in the Anglo-American context. In France, Leon Marillier (1862-1901) was the main protagonist in discussions concerning the concept of the veridical hallucination, which gave rise to criticisms by mental specialists and psychopathologists.

Spiritist delusions and spiritism in the nosography of French psychiatry (1850-1950).

At the turn of the twentieth century there was a wave of delusions which had a direct link to spiritism in their form and content. These so-called spiritist or mediumistic delusions were the object of detailed study, and clinicians assigned them a place in nosography, especially in France. This work of classification was carried out as a function of the convictions and paradoxes that these delusions aroused; it also made it possible to question the relationship between pathology and belief.

[Interpretation of writings in the psychopathologic approach to spiritualism (1850 - 1950)].

We propose a chronological review of the psychopathological interpretations of writings produced by spiritualists during their practices of trance or by spiritualists turned delirious. The interest is to highlight the exemplary role that psychiatrists or psychopathologists made attributed to mediumnism in the elaboration of psychiatric knowledge.