UnReal? Investigating the Sense of Reality and Psychotic Symptoms with Virtual Reality
1
Gonda Brain Research Center, Bar-Ilan University, Ramat Gan 5290002, Israel
2
Psychology Department, University of Haifa, Haifa 3498838, Israel
*
Author to whom correspondence should be addressed.
J. Clin. Med. 2020, 9(6), 1627; https://doi.org/10.3390/jcm9061627
Received: 15 April 2020
/
Revised: 13 May 2020
/
Accepted: 20 May 2020
/
Published: 28 May 2020
(This article belongs to the Special Issue Virtual Reality in the Assessment, Understanding and Treatment of Mental Health Disorders)
Distortions of reality, such as hallucinations, are common symptoms of many psychiatric conditions. Accordingly, sense of reality (SoR), the ability to discriminate between true and false perceptions, is a central criterion in the assessment of neurological and psychiatric health. Despite the critical role of the SoR in daily life, little is known about how this is formed in the mind. Here, we propose a novel theoretical and methodological framework to study the SoR and its relation to psychotic symptoms. In two experiments, we employed a specialized immersive virtual reality (VR) environment allowing for well-controlled manipulations of visual reality. We first tested the impact of manipulating visual reality on objective perceptual thresholds (just noticeable differences). In a second experiment, we tested how these manipulations affected subjective judgments of reality. The results revealed that the objective perceptual thresholds were robust and replicable, demonstrating that SoR is a stable psychometric property that can be measured experimentally. Furthermore, reality alterations reduced subjective reality judgments across all manipulated visual aspects. Finally, reduced sensitivity to changes in visual reality was related to self-reported prodromal psychotic symptoms. These results provide evidence for the relevance of SoR in the assessment of psychosis and other mental disorders in which reality is distorted.
View Full-Text
Keywords:
sense of reality; virtual reality; hallucinations; psychosis; derealization
▼
Show Figures
Figure 1
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
- Supplementary File 1:
PDF-Document (PDF, 531 KiB)
MDPI and ACS Style
Drori, G.; Bar-Tal, P.; Stern, Y.; Zvilichovsky, Y.; Salomon, R. UnReal? Investigating the Sense of Reality and Psychotic Symptoms with Virtual Reality. J. Clin. Med. 2020, 9, 1627. https://doi.org/10.3390/jcm9061627
AMA Style
Drori G, Bar-Tal P, Stern Y, Zvilichovsky Y, Salomon R. UnReal? Investigating the Sense of Reality and Psychotic Symptoms with Virtual Reality. Journal of Clinical Medicine. 2020; 9(6):1627. https://doi.org/10.3390/jcm9061627
Chicago/Turabian StyleDrori, Gad, Paz Bar-Tal, Yonatan Stern, Yair Zvilichovsky, and Roy Salomon. 2020. "UnReal? Investigating the Sense of Reality and Psychotic Symptoms with Virtual Reality" Journal of Clinical Medicine 9, no. 6: 1627. https://doi.org/10.3390/jcm9061627
Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.
