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Subjective estimation of time intervals has EEG-correlates in 13-30 frequency bandтезисы доклада
- Авторы: Konstantinova, Anisimov, Latanov
- Сборник: International Journal of Psychophysiology
- Серия: Proceedings of the 19th World Congress of the International Organization of Psychophysiology (IOP 2018)
- Том: 131
- Тезисы
- Год издания: 2018
- Издательство: ELSEVIER ACADEMIC PRESS INC
- Местоположение издательства: 525 B STREET, SUITE 1900, SANDIEGO, USA, CA, 92101-4495
- Первая страница: 157
- Последняя страница: 157
- Аннотация: The aim of the study was to investigate the subjective estimation of time spent for Go/No go task performance and to search for the EEG-correlates of differences in subjective time estimation. We have studied the dynamics of EEG power (10/20 standard electrode positions: O1, O2, P3, P4, C3, C4, F3, F4) during Go/No go task performance. Twelve participants performed four blocks of Go/No go task trials. Each block lasted 331s, 429 s, 545s or 827s. The durations of blocks in their sequence varied in pseudorandom order. After every block of trials the participants reported the time estimation of block duration (in seconds). We divided all blocks into the three groups accordingly to quartiles of time estimation distribution (as a time estimation unit we used difference between physical time and subjective time). The group of overestimation of time intervals (OG) included trials under first quartile (data<-67s), the accurate time judgments group (AG) - between first quartile and median (-67s<data<74,5s), and the group of underestimation of time intervals (UG) contained trials over median of time estimation distribution (data>74,5s). We analyzed the averaged power spectra and averaged relative power spectra (in percent to whole power spectra 2-30 Hz) in 4-6 Hz, 6-13 Hz and 13-30 Hz frequency bands. For statistical data analysis we used ANOVA (F1- participant; F2-electrode position with levels ‘Frontal’, ‘Central’, ‘Parietal’, ‘Occipital’; F3- lateralization with levels ‘Right’, ‘Left’; F4 - subjective time estimation (STE) with levels ‘OG’, ‘UG’, ‘AG’; F24 - electrode position*STE; F34-lateralization*STE) and Student’s t-test (with Bonferroni correction). We revealed the relationship between subjective interval estimation (among other independent variables) and beta-subband power (13-30 Hz) (F112,35184=2173.64, p<0.001; F23,35184=79.89, p<0.001; F31,35184=18.83, p<0.001; F43,35184=77.81, p<0.001; F249,35184=15.04, p<0.001; F343,35184=7,562, p<0.001). The shorter time estimation is accompanied by greater relative beta power (significant differences was observed in all electrode positions for groups UG and OG; in frontal, parietal and left central area (C3) for groups OG and AG; in parietal area, right central area (C4) and left occipital area (O1) for AG and UG). Asymmetry of relative beta-power is observed in frontal (28.4±0.4% vs 26.8±0.3%, t=2.54, df=1819, p<0.05) and central (25.2±0.3% vs 26.8±0.3%, t=-3.28, df=1847, p<0.001) cortical areas for AG and in parietal area (28.1±0.2% vs 27.3±0.2%, t=2.51, df=4600, p<0.05) for UG, no inter-hemispheric differences of relative beta power was observed for OG. Thus, subjective time estimation of task duration has EEG-correlates in relative power spectrum in 13-30 frequency band.
- Добавил в систему: Константинова Мария Витальевна