Use this url to cite publication: https://hdl.handle.net/20.500.12512/116717
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Differences in manifestation of the Oppel-Kundt illusion using the circle type of distractor among people with schizophrenia spectrum disorders / S. Galnaitytė, D. Leskauskas, A. Bulatov, E. Diržius
Type of publication
Tezės kitoje duomenų bazėje / Theses in other database (T1c)
Title
Differences in manifestation of the Oppel-Kundt illusion using the circle type of distractor among people with schizophrenia spectrum disorders / S. Galnaitytė, D. Leskauskas, A. Bulatov, E. Diržius
Extent
p. 385-386 : lent.
Is part of
Neuroscience Applied : Abstracts of the 35th ECNP Congress 2022 : 15-18 October, 2022, Vienna, Austria / European College of Neuropsychopharmacology. Amsterdam : Elsevier, 2022, vol. 1, suppl. 2.
Version
Originalus / Original
Field of Science
Abstract
Introduction: Several studies have reported differences in early visual processing, gain control and integration in patients with schizophrenia spectrum disorder (SSD). To understand the differences of visual perception in individualswith SSD, we chose to study the manifestation of the Oppel-Kundt (OK) illusion together with the circle type of distractor stimuli since previous research have already shown the distinctions with typical OK illusion. Aim: To determine differences in manifestation of the OK illusion using the circle type of distractor stimuli among people with SSD and healthy individuals. Methods: The study group consisted of 22 patients diagnosed with SSD and 22 matched individuals in the control group without any mental, neurological or vision impairments. The experiment was performed in the dark room. The subjects were looking through an artificial pupil (3 mm in diameter) at the distance of 3.5 meters from the pupil to the screen with stimuli. OK figures consisted of three white dots presented horizontally against the black background in the experiments. The circle type of distractor stimuli was used. Using computerized equipment subjects were asked to move the lateral dot and adjust the gaps between three dots of the stimulus to be equal in length. A total of 40 figures were presented in one experiment and each subject performed four experiments. For statistical analysis, ANOVA, T-test, and post hoc Bonferroni correction were used. Results: All data collected was statistically significant. The manifestation of the OK illusion was measured by the means of the patient and control groups. According to the table, the further the mean is from zero, the stronger the illusion manifests. The comparison of means showed that the illusion tended to exhibit stronger for patients with SSD. The strength of the illusion in the patient group was the biggest near distractor stimuli of size 87 (mean -5.66, SD 13.23), whereas in the control group – near distractor stimuli 150 (mean 6.51, SD 10.48). The patient group appears to display a higher degree of variation in the size of stimuli experienced until 111 as compared to the control group. However, the intensity of stimuli experienced diverges after 111. The stimuli for the patient group decreases and begins to increase after 134, whereas for the control group it linearly increases. Conclusions: The patients with SSD exhibited stronger manifestation of OK illusion together with the circle type of distractor stimuli. The patients with SSD experienced OK illusion with the circle type of distractor stimuli in polar opposite way as compared to the control group.
Type of document
type::text::conference output::conference proceedings::conference paper
ISSN (of the container)
2772-4085
Other Identifier(s)
(LSMU ALMA)991688185007106
Coverage Spatial
Austrija / Austria (AT)
Language
Anglų / English (en)