[Changes in cardiorhythm and its stochastic parameters in first-graders with normal neuropsychological development...

Influence of positive and negative motivation on the performance efficiency and some stochastic characteristics of RR-interval fluctuations in speech association experiment was studied in two groups of pupils of the first class: normally developing children and children with speech deviations. It was shown that children with normal development achieve their maximal productivity mostly under the influence of their inner motivation without external stimulation, while for achieving the maximal productivity by children with speech deviations the positive external motivation is required. Baseline ECG recordings in two groups of children significantly differed only in the standard error of the RR-intervals that was decreased in the deviant children. Under conditions of positive motivation, the maximal intellectual productivity in both groups of children was achieved at significantly different values of the fractal index beta. The findings are discussed in terms of the influence of motivation on the verbal performance and concomitant adaptation.