Department of Psychology, City University, Northampton Square, London EC1V 0HB, England.
J Exp Psychol Hum Percept Perform. 2011 Oct;37(5):1657-61. doi: 10.1037/a0024235.
Cross-modal temporal recalibration describes a shift in the point of subjective simultaneity (PSS) between 2 events following repeated exposure to asynchronous cross-modal inputs--the adaptors. Previous research suggested that audiovisual recalibration is insensitive to the spatial relationship between the adaptors. Here we show that audiovisual recalibration can be driven by cross-modal spatial grouping. Twelve participants adapted to alternating trains of lights and tones. Spatial position was manipulated, with alternating sequences of a light then a tone, or a tone then a light, presented on either side of fixation (e.g., left tone--left light--right tone--right light, etc.). As the events were evenly spaced in time, in the absence of spatial-based grouping it would be unclear if tones were leading or lagging lights. However, any grouping of spatially colocalized cross-modal events would result in an unambiguous sense of temporal order. We found that adapting to these stimuli caused the PSS between subsequent lights and tones to shift toward the temporal relationship implied by spatial-based grouping. These data therefore show that temporal recalibration is facilitated by spatial grouping.
跨模态时间校准描述了在重复暴露于异步跨模态输入（适配器）后，两个事件之间主观同时性（PSS）的变化。先前的研究表明，视听校准对适配器之间的空间关系不敏感。在这里，我们表明视听校准可以由跨模态空间分组驱动。十二名参与者适应了交替的灯光和声音。空间位置被操纵，交替的光然后是音序列，或者音然后是光，在注视点的任一侧呈现（例如，左音-左光-右音-右光等）。由于事件在时间上均匀间隔，如果没有基于空间的分组，则不清楚音是领先还是滞后于光。然而，任何空间共定位的跨模态事件的分组都会导致时间顺序的明确感觉。我们发现，适应这些刺激会导致后续灯光和声音之间的 PSS 向基于空间的分组所暗示的时间关系转移。因此，这些数据表明空间分组促进了时间校准。
