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  4. Visual masking deficits in healthy and schizophrenic women
 
conference paper

Visual masking deficits in healthy and schizophrenic women

Brand, Andreas
•
Chkonia, E.
•
Roinishvili, Maya
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2013
Perception
36th European Conference on Visual Perception

Schizophrenic patients have serious visual masking deficits which are likely related to the genetic underpinnings of the disease because also unaffected relatives of the patients show masking deficits. We presented a left/right offset vernier followed by an ISI and a masking grating. Observers indicated the offset direction. We determined the SOA (vernier duration plus ISI), to reach 75% correct responses. Analyzing a new sample, we found that patients (n=239) needed SOAs of 127.6ms, relatives (n=125) of 62.4ms, and controls (n=145) of 32.2ms. In addition, we analyzed the data for the groups separately for men and women. We found main effects of Group and Gender but no significant interaction. Female observers needed SOAs of about 15ms longer than the male observers in the control group, 25ms in the relatives group and 37ms in the schizophrenia group. For the control group, hence, females performed by a factor of nearly 2 worse than males. No gender effect was found for executive functions as measured with the WCST. It seems that both gender and the susceptibility for schizophrenia are independent main effects affecting spatio-temporal vision. Our results show that a proper gender balance is crucial in experiments where signal to noise ratio is low.

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Type
conference paper
Author(s)
Brand, Andreas
Chkonia, E.
Roinishvili, Maya
Herzog, Michael H.  
Date Issued

2013

Published in
Perception
Volume

42

Issue

ECVP Supplement

Start page

93

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LPSY  
Event nameEvent placeEvent date
36th European Conference on Visual Perception

Bremen, Germany

August 25-29, 2013

Available on Infoscience
May 26, 2014
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/103606
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