Timescale- and Sensory Modality-Dependency of the Central Tendency of Time Perception.
Timescale- and Sensory Modality-Dependency of the Central Tendency of Time Perception.
复制标题
DOI：
10.1371/journal.pone.0158921
复制
发表时间：
2016
期刊：
影响因子：
3.7
通讯作者：
Yotsumoto Y
中科院分区：
文献类型：
--
作者：
Murai Y;Yotsumoto Y
当个体被要求再现在不同时间混杂呈现的刺激的间隔时，较长的间隔常常被低估，而较短的间隔被高估。这种现象可能归因于时间知觉的集中趋势，并表明我们的大脑根据当前的刺激输入和刺激间隔分布的先验知识对刺激间隔进行最佳编码。两个不同的系统被认为是招募亚秒和超秒间隔的感知。亚秒级的计时取决于局部感觉处理，而超秒级的计时则取决于更集中的机制。为了阐明影响时间知觉的因素，本研究考察了感觉通道和时间尺度对集中趋势的影响。在实验1中，参与者被要求再现由视觉或听觉刺激定义的亚秒或超秒间隔。在次秒范围内，视觉间隔的集中趋势的幅度明显大于听觉间隔，而视觉和听觉间隔在超秒范围内表现出相关和可比的集中趋势。在实验2中，在复制任务中区分亚秒间隔的能力被控制跨模态通过使用一个间隔歧视任务。即使当辨别间隔的能力被控制，视觉间隔表现出更大的集中趋势比听觉间隔在次秒范围内。此外，视觉和听觉亚秒间隔的集中趋势的幅度显着相关。这些结果表明，一个共同的模态独立的机制是负责的超秒集中趋势，和模态依赖和模态独立的组件的计时系统有助于集中趋势在亚秒范围内。
When individuals are asked to reproduce intervals of stimuli that are intermixedly presented at various times, longer intervals are often underestimated and shorter intervals overestimated. This phenomenon may be attributed to the central tendency of time perception, and suggests that our brain optimally encodes a stimulus interval based on current stimulus input and prior knowledge of the distribution of stimulus intervals. Two distinct systems are thought to be recruited in the perception of sub- and supra-second intervals. Sub-second timing is subject to local sensory processing, whereas supra-second timing depends on more centralized mechanisms. To clarify the factors that influence time perception, the present study investigated how both sensory modality and timescale affect the central tendency. In Experiment 1, participants were asked to reproduce sub- or supra-second intervals, defined by visual or auditory stimuli. In the sub-second range, the magnitude of the central tendency was significantly larger for visual intervals compared to auditory intervals, while visual and auditory intervals exhibited a correlated and comparable central tendency in the supra-second range. In Experiment 2, the ability to discriminate sub-second intervals in the reproduction task was controlled across modalities by using an interval discrimination task. Even when the ability to discriminate intervals was controlled, visual intervals exhibited a larger central tendency than auditory intervals in the sub-second range. In addition, the magnitude of the central tendency for visual and auditory sub-second intervals was significantly correlated. These results suggest that a common modality-independent mechanism is responsible for the supra-second central tendency, and that both the modality-dependent and modality-independent components of the timing system contribute to the central tendency in the sub-second range.