Topic
Time perception
About: Time perception is a research topic. Over the lifetime, 1918 publications have been published within this topic receiving 87020 citations.
Papers published on a yearly basis
Papers
More filters
••
TL;DR: It is found that neural activity in frontoparietal and occipitotemporal regions increased the more an action continuation was shifted backwards in time, implying that the neural implementation of predicting actions undergoes similar changes as the neural process of executing actions in older adults.
Abstract: Successful social interactions depend on the ability to anticipate other people's actions. Current conceptualizations of brain function propose that causes of sensory input are inferred through their integration with internal predictions generated in the observer's motor system during action observation. Less is known concerning how action prediction changes with age. Previously we showed that internal action representations are less specific in older compared with younger adults at behavioral and neural levels. Here, we characterize how neural activity varies while healthy older adults aged 56-71 years predict the time-course of an unfolding action as well as the relation to task performance. By using fMRI, brain activity was measured while participants observed partly occluded actions and judged the temporal coherence of the action continuation that was manipulated. We found that neural activity in frontoparietal and occipitotemporal regions increased the more an action continuation was shifted backwards in time. Action continuations that were shifted towards the future preferentially engaged early visual cortices. Increasing age was associated with neural activity that extended from posterior to anterior regions in frontal and superior temporal cortices. Lower sensitivity in action prediction resulted in activity increases in the caudate. These results imply that the neural implementation of predicting actions undergoes similar changes as the neural process of executing actions in older adults. The comparison between internal predictions and sensory input seems to become less precise with age leading to difficulties in anticipating observed actions accurately, possibly due to less specific internal action models.
17 citations
••
TL;DR: Intersensory differences in temporal judgments, that is, auditory stimuli are perceived as longer than physically equivalent visual stimuli, are confirmed, and an interaction of boundary modality and interval modality suggested that auditorially defined intervals provided more temporal information about events occurring in close temporal proximity than visually defined intervals.
Abstract: The present experiment assessed intersensory differences in temporal judgments, that is, auditory stimuli are perceived as longer than physically equivalent visual stimuli. The results confirmed the intersensory difference. Auditorially defined intervals were experienced as longer than visually defined intervals. Auditory boundaries were perceived as longer than visual ones. An interaction of boundary modality and interval modality was obtained which suggested that auditorially defined intervals provided more temporal information about events occurring in close temporal proximity than visually defined intervals. It was hypothesized that cognitive factors, specifically stimulus complexity, would affect the auditory and visual systems differentially. This hypothesis was not substantiated, although highly complex stimuli were experienced as longer than those of low complexity.
17 citations
••
TL;DR: In this paper, the authors investigated the association between subjective time and agency during voluntary action and found that participants performed hand action while watching a video feedback of their hand with various delays to manipulate agency.
17 citations
••
TL;DR: Results of an acoustic duration reproduction task with stimulus duration of 2, 4, and 6 s are reported, using 45 emotionally negative, positive, and neutral sounds from the International Affective Digitized Sounds System, to investigate the influence of induced emotions on perceived duration.
Abstract: We report results of an acoustic duration reproduction task with stimulus duration of 2, 4 and 6 s, using 45 emotionally negative, positive, and neutral sounds from the International Affective Digitized Sounds System, in a sample of 31 young healthy participants. To investigate the influence of induced emotions on perceived duration, the effects of emotional modulation were quantified in two ways: (i) via model-free indices (aggregated ratios of reproduced times), and (ii) via dual klepsydra model (DKM)-based estimates of parameters of internal time representation. Both data-analytic approaches reveal an effect of emotional valence/arousal, namely, a significantly longer reproduction response for emotional stimuli than for the neutral stimuli. The advantage of the DKM-based approach is its ability to disentangle stimulus-related effects, which are represented by ‘flow intensities’, from general effects which are due to the lossy character of temporal integration. We explain the rationale of the DKM-based strategy and interpret the observed effect within the DKM framework as transient increase of internal ’flows’. This interpretation is in line with recent conceptualizations of an ‘embodiment’ of time where the model-posited flows correspond to the ongoing stream of interoceptive (bodily) neural signals. Neurophysiological findings on correlations between the processing of body signals and the perception of time provide cumulative evidence for this working hypothesis.
16 citations
••
TL;DR: The cerebellum, and the olivo-cerebellar system in particular, may be the central mechanism of a neural clock that provides a rhythmic neural signal used to time motor and cognitive processes.
Abstract: The cerebellum, and the olivo-cerebellar system in particular, may be the central mechanism of a neural clock that provides a rhythmic neural signal used to time motor and cognitive processes. Several independent lines of evidence support this hypothesis. First, the resting membrane potential of neurons in the inferior olive oscillates at ~10 Hz and the neural input from the olive leads to rhythmic complex spikes in cerebellum Purkinje cells. Second, the repeating modular microstructure of the cerebellum is ideally suited for performing computations underlying a basic neural process such as timing. Third, damage to the cerebellum leads to deficits in the perception of time and in the production of timed movements. Fourth, functional imaging studies in human subjects have shown activation of the inferior olive specifically during time perception. However, additional data on the exact role of rhythmic cerebellar activity during basis motor and sensory processing will be necessary before the hypothesis that the cerebellum is a neural clock is more widely accepted.
16 citations