Harvey Craig, Van der Burg Erik, Alais David
School of Psychology, Brennan MacCallum Building (A18), The University of Sydney, Sydney, NSW 2006, Australia.
School of Psychology, Brennan MacCallum Building (A18), The University of Sydney, Sydney, NSW 2006, Australia.
Brain Res. 2014 Oct 17;1585:120-30. doi: 10.1016/j.brainres.2014.08.028. Epub 2014 Aug 19.
Crossmodal integration of sensory signals can improve perception and behavior but requires the signals to occur close in time. Differences in propagation and processing speeds make this difficult. Temporal recalibration is a useful 're-alignment' process by which the point of subjective synchrony is temporally realigned towards an adapted asynchrony. A recent study by Van der Burg et al. (2013). J. Neurosci. 33, 14633-14637 showed temporal recalibration can occur rapidly following a single exposure to a brief audiovisual asynchrony. Using a similar procedure, this study confirms their rapid recalibration effect and shows that it occurs even when the single exposure differs in its auditory and visual features from the test stimulus. Using the same procedure in a unimodal context showed that rapid recalibration does not occur in audition following exposure to asynchronous tones of different frequencies, nor in vision following asynchronous lines differing in colour and orientation. This pattern of results suggests that rapid recalibration is in essence an inter-sensory temporal process. It serves to realign asynchronies between modalities with no selectivity for feature identity and does not operate within modalities.
感觉信号的跨模态整合可以改善感知和行为，但要求信号在时间上接近发生。传播和处理速度的差异使得这变得困难。时间重新校准是一个有用的“重新对齐”过程，通过这个过程，主观同步点在时间上朝着适应的异步状态重新对齐。范德伯格等人（2013年）发表在《神经科学杂志》第33卷，第14633 - 14637页上的一项最新研究表明，在单次暴露于短暂的视听异步之后，时间重新校准可以迅速发生。采用类似的程序，本研究证实了他们的快速重新校准效应，并表明即使单次暴露在听觉和视觉特征上与测试刺激不同，这种效应也会发生。在单模态环境中使用相同的程序表明，在暴露于不同频率的异步音调后，听觉中不会发生快速重新校准，在暴露于颜色和方向不同的异步线条后，视觉中也不会发生快速重新校准。这种结果模式表明，快速重新校准本质上是一个跨感觉的时间过程。它用于重新对齐不同模态之间的异步，对特征同一性没有选择性，并且不在模态内起作用。
