The aim of this article was to investigate the relationship between P300, evoked by a standard visual oddball paradigm, and extraversion measured by the Eysenck Personality Questionnaire (EPQ-RA). The sample consisted of 54 subjects, all female, right-handers, in the age range 19-23 years. P300 was measured using occipital and parietal electrodes in two repeated trials for each subject. Regardless of the trial block, the electrode site effect was significant for both latencies and amplitudes. A tendency towards lower P300-amplitudes emerged in the second trial, implying a habituation effect. Subjects with higher extraversion showed significantly shorter P300-latencies recorded on the parietal group of electrodes (P3 and P4). However, as a more prominent relationship in the same direction was determined between the extraversion sub trait adventurousness and P300-latency, the effect of extraversion could be mainly attributable to adventurousness. The findings are discussed in terms of arousal theory and task demands.
The present investigation was undertaken to resolve the controversy regarding clouding of results on the dimension of extraversion and performance. Hence the impulsivity component of extraversion was separated from sociability to see its effect on performance in terms of letter cancellation task and Anagram task under instructionally induced stress in the two sexes. The general pattern in three factor interaction reveals that high impulses coupled with stress performed less efficiently than their counterparts in both the sexes.
The aim of this research is to verify the relationship between the concept of God, selected personality characteristics and university students' quality of life and to determine the strength of their prediction in relation to the examined construct. The sample is 199 university students who participated in the survey. The concept of God was measured by using the ´Emotions towards God´ and ´Images of God´ (Petersen, 1993) questionnaires; the selected personal characteristics (extraversion, neuroticism) by using the scales of the NEO-FFI questionnaire (Ruisel, Halama, 2007), and quality of life was surveyed by the ´Subjective assessment of quality of life questionnaire (Džuka, 2014). The results of regression analysis showed that the highest predictive power of personality characteristic is extraversion which explained 45-71% of variance of the psychosocial, environmental and physical domain of the quality of life. This with the exception of the cognitive domain in which the highest percent of variance (65%) is represented by emotions towards God experienced as closeness/security. This variable participated in the variance of the other domains with 2-5%. The other predictors with the prediction power of 1-5% were: gender, housing, age, emotions towards God such as fear/guilt and unfavourable feelings, and also images of God as a mystical and distant/abstract entity.
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