Functional hemispheric asymmetries in perception of digit and line orientation orientation (author's transl)]

In Exp. I, right-handed Ss made the "same" or "diffeeent" judgement to paired digits serially presented to the right and left visual field, and exhibited erroneous judgements in the left visual field lead condition. These results suggest the left hemisphere superiority. In Exp. II, the Ss were requested to make the "same" or "different" judgment and to press a key as fast as possible to the paired line orientation. The right visual field lead condition product more errors than the left visual field lead condition. This suggests the right hemisphere superiority. But no difference appeared between both conditions in the reaction time. The opposite hemispheric superiority, found in perceiving verbal and non-verbal materials in the 2 experiments, would be attributed to the basic difference in "perceptual" process.