The role of visual attention during elaboration of visual differentiation (VD) of three stimuli, each of them signaled its own instrumental reaction directed to the certain object has been studied in experiments with two males of northern fur seal. In one of the fur seals VD formed by the standard motor and food methods, for the other the "blind" assertion of stimulus field (without stimulus demonstration) was introduced during VD formation in the accidental order. The animal's orientation to the stimulus field and the absence of any reaction to the objects during 15 s was confirmed. It has been shown that in this special training of visual attention mechanism the attainment of learning criteria realizes well quicker--more than twofold.
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