Role of the cerebral hemispheres in memorization, reproduction, and recognition of word and numbers has been studied on 7-8 years old children. It has been found that functional asymmetry of the hemispheres is more pronounced in girls under conditions of lateral perception of words; in boys this phenomenon corresponds to the lateral perception of numbers. In boys as well as in girls recognition was more efficient as compared with reproduction only in relation to words. Efficiency of recognition of numbers after singular lateral presentation was the same as efficiency of reproduction under similar conditions.