Vasiljeva N N, 2006, "Age dynamics of ocular dominance assessed in conditions of binocular rivalry" Perception 35 ECVP Abstract Supplement
Age dynamics of ocular dominance assessed in conditions of binocular rivalry
N N Vasiljeva
Dichoptically presented uniform light fields were used to evoke binocular rivalry. While the right eye of a subject was stimulated, his left eye was in darkness, and vice versa. In such conditions, subjects usually observed episodic darkening of the visual field that could be treated as a temporary prevalence of the eye 'stimulated by darkness' in the course of binocular rivalry. The difference in the number (N) of such dark intervals per minute (\uDelta1n) in conditions when only right and only left eye is stimulated could be taken as an index of eye dominance. In such conditions, we examined two hundred children aged 5 - 10 years and one hundred adults. The value of N varied from 0 to 15. The mean value of \uDelta1n appeared to increase with age systematically from about -1 0.8 in the youngest children to +1 1.1 in adults; the zero level was crossed at the age of 7.5 years. To explain the observed developmental changes in the average index of eye dominance, one could postulate that, in subjects with potential left-eye dominance, the asymmetry of ocular relations makes itself evident earlier than in subjects with potential right-eye dominance, but the resulting number of subjects with right-eye dominance is greater.
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