[Development in human ontogeny of the ability to reproduce a given rhythm]. / O formirovanii v ontogeneze cheloveka sposobnosti k vosproizvedeniiu zadannogo ritma.

Studies have been made on the capacity of persons from various age groups to reproduce the frequency of the given sonic sequence vocally or by hand. It was shown that each age group has its own optimal frequency band. The younger a person, the more narrow the zone of optimal reproduction of rhythm and the upper frequency of the reproduced rhythm. The highest precision of reproduction of the rhythm both vocally and by hand was observed in adult persons. In all age groups investigated, the highest precision of rhythmic reproduction is observed within the frequencies of amplitudal modulation of speech (3-6 Hz).