1990'6, p.144
Sergeev S. N.
Apparatus method of time perception and "time sense" formation parameters' study
(RESUME)

The device allowing to determine time parameters (duration, tempo, rithm) by supply of single or repeating light or sound sygnal series (differing by frequency) and to register examinee's perception is described. It can be used for rational rithm of movements formation, the making of exercise rithmical model and information about differences in necessary and really achieved time parameters for movement correction.