Slow binocular rivalry in bipolar disorder

Miller, S. M. and Gynther, B. D. and Heslop, K. R. and Liu, G. B. and Mitchell, P. B. and Ngo, T. T. and Pettigrew, J. D. and Geffen, L. B. (2003) Slow binocular rivalry in bipolar disorder. Psychological Medicine, 33 (4). pp. 683-692. ISSN 0033-2917

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Background. The rate of binocular rivalry has been reported to be slower in subjects with bipolar disorder than in controls when tested with drifting, vertical and horizontal gratings of high spatial frequency.
Method. Here we assess the rate of binocular rivalry with stationary, vertical and horizontal gratings of low spatial frequency in 30 subjects with bipolar disorder, 30 age- and sex-matched controls, 18 subjects with schizophrenia and 18 subjects with major depression. Along with rivalry rate, the predominance of each of the rivaling images was assessed, as was the distribution of normalized rivalry intervals.
Results. The bipolar group demonstrated significantly slower rivalry than the control, schizophrenia and major depression groups. The schizophrenia and major depression groups did not differ significantly from the control group. Predominance values did not differ according to diagnosis and the distribution of normalized rivalry intervals was well described by a gamma function in all groups.
Conclusions. The results provide further evidence that binocular rivalry is slow in bipolar disorder and demonstrate that rivalry predominance and the distribution of normalized rivalry intervals are not abnormal in bipolar disorder. It is also shown by comparison with previous work, that high strength stimuli more effectively distinguish bipolar from control subjects than low strength
stimuli. The data on schizophrenia and major depression suggest the need for large-scale specificity trials. Further study is also required to assess genetic and pathophysiological factors as well as the potential effects of state, medication, and clinical and biological subtypes.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Published version deposited in accordance with the copyright policy of the publisher.
Faculty / Department / School: Historic - Faculty of Sciences - Department of Biological and Physical Sciences
Date Deposited: 11 Oct 2007 01:22
Last Modified: 08 Nov 2013 04:06
Uncontrolled Keywords: binocular rivalry; bipolar disorder
Fields of Research : 11 Medical and Health Sciences > 1103 Clinical Sciences > 110319 Psychiatry (incl. Psychotherapy)
11 Medical and Health Sciences > 1113 Ophthalmology and Optometry > 111303 Vision Science
11 Medical and Health Sciences > 1117 Public Health and Health Services > 111714 Mental Health
Socio-Economic Objective: C Society > 92 Health > 9201 Clinical Health (Organs, Diseases and Abnormal Conditions) > 920107 Hearing, Vision, Speech and Their Disorders
Identification Number or DOI: 10.1017/S0033291703007475

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