Topic
Time perception
About: Time perception is a research topic. Over the lifetime, 1918 publications have been published within this topic receiving 87020 citations.
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TL;DR: This work investigates how audiovisual context affects perceived event duration with experiments in which observers reported which of two stimuli they perceived as longer, and shows that auditory influences on subjective visual durations occur only when the temporal characteristics of the stimuli promote perceptual grouping.
Abstract: Here, we investigate how audiovisual context affects perceived event duration with experiments in which observers reported which of two stimuli they perceived as longer. Target events were visual and/or auditory and could be accompanied by nontargets in the other modality. Our results demonstrate that the temporal information conveyed by irrelevant sounds is automatically used when the brain estimates visual durations but that irrelevant visual information does not affect perceived auditory duration (Experiment 1). We further show that auditory influences on subjective visual durations occur only when the temporal characteristics of the stimuli promote perceptual grouping (Experiments 1 and 2). Placed in the context of scalar expectancy theory of time perception, our third and fourth experiments have the implication that audiovisual context can lead both to changes in the rate of an internal clock and to temporal ventriloquism-like effects on perceived on- and offsets. Finally, intramodal grouping of auditory stimuli diminished any crossmodal effects, suggesting a strong preference for intramodal over crossmodal perceptual grouping (Experiment 5).
48 citations
TL;DR: It is found that two sounds presented in temporal proximity to, or synchronously with, the two visual frames, respectively, can shift the transitional threshold for visual apparent motion and the perceived audiovisual interval could be predicted by optimal integration of the visual and auditory intervals.
Abstract: Research on multisensory interactions has shown that the perceived timing of a visual event can be captured by a temporally proximal sound. This effect has been termed 'temporal ventriloquism effect.' Using the Ternus display, we systematically investigated how auditory configurations modulate the visual apparent-motion percepts. The Ternus display involves a multielement stimulus that can induce either of two different percepts of apparent motion: 'element motion' or 'group motion'. We found that two sounds presented in temporal proximity to, or synchronously with, the two visual frames, respectively, can shift the transitional threshold for visual apparent motion (Experiments 1 and 3). However, such effects were not evident with single-sound configurations (Experiment 2). A further experiment (Experiment 4) provided evidence that time interval information is an important factor for crossmodal interaction of audiovisual Ternus effect. The auditory interval was perceived as longer than the same physical visual interval in the sub-second range. Furthermore, the perceived audiovisual interval could be predicted by optimal integration of the visual and auditory intervals.
48 citations
TL;DR: Whether schizophrenia patients with first-rank (passivity) symptoms have a time perception impairment is examined using an auditory discrimination task requiring judgments of temporal intervals, and the results showed that patients with FRS experienced time differently by underestimating the duration of time intervals.
Abstract: Schizophrenia patients with first-rank (passivity) symptoms (FRS) report a loss of clear boundaries between the self and others and that their thoughts and actions are controlled by external forces. One of the more widely accepted explanatory models of FRS suggests a dysfunction in the 'forward model' system, whose role consists in predicting the sensory consequences of actions [Frith, C., 2006. The neural basis of hallucinations and delusions. Comptes Rendus Biologies 328, 169-175.]. There has been recent interest in the importance of timing precision underlying both the functioning of the forward model, and in processes contributing to the mechanisms of self-recognition [Haggard, P., Martin, F., Taylor-Clarke, M., Jeannerod, M., Franck, N., 2003. Awareness of action in schizophrenia. Neuroreport 14, 1081-1085.]. In the current study, we examined whether schizophrenia patients with FRS have a time perception impairment, using an auditory discrimination task requiring judgments of temporal intervals. Thirty-five schizophrenia patients (15 with, and 20 without, FRS), and 16 non-clinical controls completed the task. The results showed that patients with FRS experienced time differently by underestimating the duration of time intervals. Given the role of timing in shaping sensory awareness and in the formation of causal mental associations, a breakdown in timing mechanisms may affect the processes relating to the perceived control of actions and mental events, leading to disturbances of self-recognition in FRS.
47 citations
Journal Article•
47 citations
TL;DR: Laterality in the perception of non-stationary aspects of musical timbre was investigated in 54 right-handed non-musicians, finding compatibility with the generally accepted notion that spectral and temporal integrations of sounds are primarily functions of the right and left hemisphere.
47 citations