OBJECTIVE: An association between hallucinations and reality-monitoring deficit has been repeatedly observed in patients with schizophrenia. Most data concern auditory/verbal hallucinations. The aim of this study was to investigate the association between visual hallucinations and a specific type of reality-monitoring deficit, namely confusion between imagined and perceived pictures. METHOD: Forty-one patients with schizophrenia and 43 healthy control participants completed a reality-monitoring task. Thirty-two items were presented either as written words or as pictures. After the presentation phase, participants had to recognize the target words and pictures among distractors, and then remember their mode of presentation. RESULTS: All groups of participants recognized the pictures better than the words, except the patients with visual hallucinations, who presented the opposite pattern. The participants with visual hallucinations made more misattributions to pictures than did the others, and higher ratings of visual hallucinations were correlated with increased tendency to remember words as pictures. No association with auditory hallucinations was revealed. CONCLUSIONS: Our data suggest that visual hallucinations are associated with confusion between visual mental images and perception.
OBJECTIVE: An association between hallucinations and reality-monitoring deficit has been repeatedly observed in patients with schizophrenia. Most data concern auditory/verbal hallucinations. The aim of this study was to investigate the association between visual hallucinations and a specific type of reality-monitoring deficit, namely confusion between imagined and perceived pictures. METHOD: Forty-one patients with schizophrenia and 43 healthy control participants completed a reality-monitoring task. Thirty-two items were presented either as written words or as pictures. After the presentation phase, participants had to recognize the target words and pictures among distractors, and then remember their mode of presentation. RESULTS: All groups of participants recognized the pictures better than the words, except the patients with visual hallucinations, who presented the opposite pattern. The participants with visual hallucinations made more misattributions to pictures than did the others, and higher ratings of visual hallucinations were correlated with increased tendency to remember words as pictures. No association with auditory hallucinations was revealed. CONCLUSIONS: Our data suggest that visual hallucinations are associated with confusion between visual mental images and perception.
Authors: Christian Stephan-Otto; Sara Siddi; Carl Senior; Daniel Muñoz-Samons; Susana Ochoa; Ana María Sánchez-Laforga; Gildas Brébion Journal: PLoS One Date: 2017-01-03 Impact factor: 3.240
Authors: Yuliya Zaytseva; Iveta Fajnerová; Boris Dvořáček; Eva Bourama; Ilektra Stamou; Kateřina Šulcová; Jiří Motýl; Jiří Horáček; Mabel Rodriguez; Filip Španiel Journal: Front Psychol Date: 2018-07-03
Authors: Flavie Waters; Daniel Collerton; Dominic H Ffytche; Renaud Jardri; Delphine Pins; Robert Dudley; Jan Dirk Blom; Urs Peter Mosimann; Frank Eperjesi; Stephen Ford; Frank Larøi Journal: Schizophr Bull Date: 2014-07 Impact factor: 9.306