1984'5, p.115
Netopina S. A.
Oscillatory changes in attention as a law of the brain's functioning

Attention has been studied by means of a proof-reading test in 46 schoolchildren during 4 years (627 measurements have been taken). A certain pendulum-type regularity in the dynamics of attention during a school day has been established. Any single measurement must be regarded as an averaging indicator of the individual bio-sociorythm, which is to be taken into account in estimation of mental efficiency by means of a proof-reading technique.