5-, 7-, and 10-yr.-old children were tested on a lateralized color-naming task, the colors being presented unilaterally and monocularly. Each age group was composed of 20 boys and 20 girls. A significant effect of age was found, with the greatest perceptual asymmetry (a significant left visual-field effect) being observed for the 5-yr.-old group, and the smallest perceptual asymmetry for the 7-yr.-old group.
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