Individual personality-related characteristics of event-related EEG potentials recorded in an experimental situation requiring production of time intervals |
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Authors: | V B Pavlenko I N Konareva |
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Institution: | (1) Simferopol’, Crimean Autonomous Republic, Vernadskii National University, Ukraine |
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Abstract: | Event-related EEG potentials (ERP) were recorded from 75 tested adult men and women; recording was performed from C3 and C4
points. The experimental situation required internal counting of time intervals limited by two pushes of a button. The experimental
paradigm provided a substantial level of uncertainty, and a high level of attention needed to be maintained. The tested subjects
were not informed by the experimenter about the precise value of the preset time interval; they knew only its limits, 17–23
sec. The subject obtained information about the agreement or disagreement between the produced interval and its value preset
by the experimenter by visual feedback signals obtained 2 sec after termination of counting; in the case of agreement the
subject had to perform a confirming (third) push of the button. Pushes were preceded by readiness potentials (RP); contingent
negative variation (CNV) developed before the feedback signals, and the latter were accompanied by P300 potentials. Significant
positive correlations were found between the parameters of RP and P300 in both hemispheres. In general, ERP were characterized
by very high interindividual variability, which in a few respects correlated with the personality-related characteristics
of tested subjects evaluated by psychological testing with the use of corresponding questionnaires. In particular, under the
experimental conditions used, negative correlations were observed between the RP amplitude and psychotism indices, CNV amplitude
and emotional stability; CNV amplitude and extroversive features, and P300 amplitude and domination properties of a person.
Positive correlations were observed between the CNV amplitude and autia factor (according to Eysenck’s PEN and Cattell’s 16
PF questionnaires). We suppose that correlations between the personal psychical features and ERP parameters are grounded in
both inherited constitutional specificities of the nervous system and neurochemical/structural modifications in the brain
determined by the acquired vital experience. |
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Keywords: | event-related potentials readiness potential contingent negative variation P300 potential production of time intervals interindividual variability personality-related specificity |
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