Leibniz Research Centre for Working Environment and Human Factors (IfADo), Technical University of Dortmund, Dortmund, Germany.
Eur J Neurosci. 2022 Jan;55(1):121-137. doi: 10.1111/ejn.15553. Epub 2021 Dec 14.
Attentional models of time perception assume that the perceived duration of a stimulus depends on the extent to which attentional resources are allocated to its temporal information. Here, we studied the effects of auditory distraction on time perception, using a combined attentional-distraction duration-discrimination paradigm. Participants were confronted with a random sequence of long and short tone stimuli, most of which having a uniform (standard) pitch and only a few a different (deviant) pitch. As observed in previous studies, pitch-deviant tones impaired the discrimination of tone duration and triggered a sequence of event-related potentials (ERPs) reflecting a cycle of deviance detection, involuntary attentional distraction and reorientation (MMN, P3a, RON). Contrasting ERPs of short and long tone durations revealed that long tones elicited a more pronounced fronto-central contingent negative variation (CNV) in the time interval after the expected offset of the short tone as well as a more prominent centro-parietal late positive complex (LPC). Relative to standard-pitch tones, deviant-pitch tones especially impaired the correct discrimination of long tones, which was associated with a reduction of the CNV and LPC. These results are interpreted within the theoretical framework of resource-based models of time perception, in which involuntary distraction due to a deviant event led to a withdrawal of attentional resources from the processing of time information.
注意时间知觉模型假设，刺激的感知持续时间取决于注意力资源分配给其时间信息的程度。在这里，我们使用结合了注意力分散持续时间辨别范式的方法，研究了听觉分散对时间知觉的影响。参与者面临着一系列随机的长音和短音刺激，其中大多数具有统一（标准）的音高，只有少数具有不同（偏差）的音高。如先前的研究中观察到的，音高偏差音会损害音长的辨别，并引发一系列反映偏差检测、无意识注意力分散和重新定向的事件相关电位（ERP）（MMN、P3a、RON）。对比短音和长音的 ERP 揭示，长音在预期短音结束后的时间间隔内引发了更明显的额中央伴随负变（CNV），以及更显著的中央顶叶晚期正复合（LPC）。与标准音相比，偏差音尤其会损害长音的正确辨别，这与 CNV 和 LPC 的减少有关。这些结果在基于资源的时间知觉模型的理论框架内进行了解释，在该模型中，由于偏差事件引起的无意识分散会导致注意力资源从时间信息的处理中撤回。
