[Mechanism of time perception by animals]

The study of changes in the precision of evaluating different time intervals by animals (monkeys, rabbits) showed that the value of error in time evaluation delta and the value of confidential interval of time evaluation delta, characterizing differential thresholds of time perception, depend on the duration of signal interval, which is in maximal conformity with Weber's law. The revealed dependence is considered as a sign of the increase with time of the intensity of excitatory process, used by the nervous system as a substratum for time counting. Assumed nature of neurodynamic processes underlying this relation is discussed.