O2.5. DISENTANGLING FALSE PERCEPTIONS ELICITED BY WHITE NOISE IN PEOPLE WITH AUDITORY HALLUCINATIONS: THE ROLE OF SOUND FREQUENCIES AND EXPECTATIONS

摘要

Auditory Hallucinations (AH) are prevalent in many psychopathologies as well as in a minority of the healthy general population. The literature suggests that people with AH present a signal detection bias, that is, in conditions of uncertainty, they tend to perceive signals that are not actually there– or false perceptions. For example, when listening to white noise, they perceive voices that are not actually in the noise. However, the literature is inconsistent regarding the relation between the number of false perceptions and hallucination proneness. In particular, whereas some studies have reported a significant correlation, other have not. Such inconsistencies may be explained by the lack of understanding of the white noise paradigm and in particular the role of the noise and of the level of expectation. The aim of the present study was thus to disentangle the white noise paradigm and to explore the specific relations with AH and other cognitive mechanisms or personality traits.