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Ergebnisse 4 Einträge
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Boredom is an everyday experience during uneventful situations and while waiting. Such situations are typically described as unpleasant since oneself becomes the focus of awareness, and the subjective duration expands. Self-control is an individual trait that helps to cope with unpleasant situations. Hardly any systematic studies exist on real waiting situations where people's boredom and subjective time experience are assessed in relation to self-control. Therefore, we assessed 99 participants who first filled out self-report questionnaires on emotional and metacognitive control, the Scale for Experiencing Emotions (SEE) and the Temporal Metacognition Scale (TMCS). After giving a fake reason for why they had to wait, participants were shut in an empty room alone for 7.5 minutes and afterwards asked to report their impressions regarding the experienced time and reactions to the situation. Boredom was associated with the feeling of time passing more slowly and more frequent thoughts about time. The propensity to self-regulate was related to less awareness of time and to lower levels of boredom. Mediation analyses revealed that the level of boredom mediates the relationships between self-regulation processes and time perception. The results provide new insights into the association between time perception and boredom as states in a real situation and self-regulation as a trait.
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While the contingent negative variation (CNV) has been the subject of extensive research over the last fifty years, the maximum duration during which such cortical negativity can be maintained has, to the best of our knowledge, never been systematically explored. Participants were presented with the classic S1-S2 paradigm task, where a warning stimulus (S1) acts as a cue for the appearance of an imperative stimulus (S2). A fast motor response was required upon S2 arrival. Inter-stimulus intervals (ISIs) of 2.5, 5, 7.5 and 10 s duration were presented in blocked fashion. Data was analysed using both EEG referenced to linked mastoids and the current source density (CSD) technique, which maximizes the cortical origin of the measured voltage. Mean late CNV (lCNV) amplitude was found to be significantly higher for fast reaction time (RT) trials when CSD data was split according to the median into 'fast' and 'slow' RT halves. Post-hoc comparisons showed that this RT effect was particularly strong for the 10 s condition. This may be explained by the lack of an lCNV component and thus of cortical negativity prior to S2 in the 10 s condition. Our results suggest that intervals of a duration between 7.5 and 10 s represent the upper boundary during which the lCNV component can be elicited.
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Floatation-REST (Reduced Environmental Stimulation Therapy) minimizes stimulation of the nervous system by immersing subjects in an environment without sound or light while they effortlessly float in thermoneutral water supersaturated with Epsom salt. Here we investigated the relationship between altered states of consciousness (ASC) and its association with the affective changes induced by Floatation-REST. Using a within-subject crossover design, 50 healthy subjects were randomized to 60 min of Floatation-REST or 60 min of Bed-REST (an active control condition that entailed lying supine on a warm waterbed in a dark and quiet room). Following Floatation-REST, subjects felt significantly more relaxed, less anxious, and less tired than after Bed-REST. Floatation-REST also induced significantly more pronounced ASC characterized by the dissolution of body boundaries and the distortion of subjective time. The loss of body boundaries mediated the loss of anxiety, revealing a novel mechanism by which Floatation-REST exerts its anxiolytic effect.
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It has been repeatedly shown that specific brain activity related to planning movement develops before the conscious intention to act. This empirical finding strongly challenges the notion of free will. Here, we demonstrate that in the Libet experiment, spontaneous fluctuations of the slow electro-cortical potentials (SCPs) account for a significant fraction of the readiness potential (RP). The individual potential shifts preceding self-initiated movements were classified as showing a negative or positive shift. The negative and positive potential shifts were analyzed in a self-initiated movement condition and in a no-movement condition. Comparing the potential shifts between both conditions, we observed no differences in the early part of the potential. This reveals that the apparently negative RP emerges through an unequal ratio of negative and positive potential shifts. These results suggest that ongoing negative shifts of the SCPs facilitate self-initiated movement but are not related to processes underlying preparation or decision to act.
Erkunden
Team
- Wittmann (4)
Eintragsart
Sprache
- Englisch (4)
Thema
- Young Adult
- Adolescent (2)
- Adult (4)
- Altered states of consciousness (1)
- Anxiety (1)
- Bed Rest (1)
- Body boundaries (1)
- *Boredom (1)
- Boredom (1)
- Brain Waves/*physiology (1)
- Cerebral Cortex/*physiology (2)
- *Consciousness/physiology (1)
- Contingent negative variation (1)
- Contingent Negative Variation/*physiology (2)
- Cross-Over Studies (1)
- Cross-Sectional Studies (1)
- Current source density (1)
- Electroencephalography/*methods (1)
- Emotion (1)
- Emotions (1)
- Event-related potential (1)
- Female (4)
- Floatation-REST (1)
- Humans (4)
- Male (4)
- Middle Aged (1)
- Movement/*physiology (1)
- Psychomotor Performance/*physiology (1)
- Reaction time (1)
- Reaction Time/*physiology (1)
- Relaxation (1)
- Rest/physiology (1)
- Self-control (1)
- Self-Control/*psychology (1)
- Self Report (1)
- Slow cortical potential (1)
- Time Factors (1)
- *Time Perception (1)
- Time perception (2)
- Volition/*physiology (1)
- Waiting situation (1)