[Conditioned reflexes in relation to temporal intervals].

The paper outlines the results of experiments on twelve rats aimed at studying conditioned reflexes of discrimination of both absolute and relative characteristics of time intervals (30 and 180; 10 and 90; 5 and 45; 5 and 40; 5 and 35; 5 and 30 sec). The data obtained are discussed in the light of I.P. Pavlov's hypothesis regarding the physiological mechanism of conditioning to time.