In 453 Wistar rats, the motor-food and the ECS-avoidance behavioral techniques were used for conditioning, generalization and specialization of conditioned reflex, dynamic stereotype, synthesis of visual image, conditioning to a set of stimuli. The primary and the secondary kinds of stimuli analysis and synthesis were distinguished. The induction and deduction were regarded as a certain time sequence of analysis and synthesis. The left hemisphere was shown to perform mainly the primary analysis and the secondary synthesis, whereas the right hemisphere--the primary synthesis and the secondary analysis. The left hemisphere of the animals' brain seems mainly to process the information on the induction principle (i.e., from particular to general) whereas the right hemisphere seems to reflect the environment on the deduction principle (from general to particular).