| Abstrakt: |
The article assesses the intersubject synchronization of bioelectric activity during competitive performance in dyads of creative and non-creative verbal tasks. The study involved 22 pairs of volunteers from 18 to 23 years old. Participants synchronously performed creative (to create original ways to use everyday objects) and non-creative (to list objects from the proposed category) tasks in the conditions of competition with each other. Two methods of calculating the intersubject synchronization are considered: phase locking value and circular correlation coefficient. To detect non-random changes, a permutation approach was used, and artificially noisy comparison samples (controls) were generated by permutation the initial time series: (a) by epochs (2 s) and (b) by each separate time points. Circular correlation coefficients were more "stable" (gave reproducibly similar results) when compared with different controls generated by the permutation approach than phase locking value. We obtained by the analysis of circular correlation coefficients in comparison with the control data generated on the basis of permutation of separate time points: during creative activity, there was mainly an increase in intersubject synchronization in the theta (4–7.8 Hz), alpha-2 (10–13.4 Hz) and beta (13.5–30 Hz) EEG frequency bands, in alpha-1 (8–9.8 Hz), synchronization between the participants decreased. During the control task, bidirectional changes of intersubject synchronization were observed: decrease in theta and alpha-1 frequency bands, bidirectional changes in alpha-2 and beta bands. The comparison of the results shows that in creative activity, even in the conditions of competition, there is a greater intersubject synchronization than in non-creative activity. [ABSTRACT FROM AUTHOR] |
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