Harrison Neil
Department of Psychology, Liverpool Hope University, Liverpool, UK.
Seeing Perceiving. 2012;25(1):71-85. doi: 10.1163/187847611X620928.
The phenomenon of crossmodal dynamic visual capture occurs when the direction of motion of a visual cue causes a weakening or reversal of the perceived direction of motion of a concurrently presented auditory stimulus. It is known that there is a perceptual bias towards looming compared to receding stimuli, and faster bimodal reaction times have recently been observed for looming cues compared to receding cues (Cappe et al., 2009). The current studies aimed to test whether visual looming cues are associated with greater dynamic capture of auditory motion in depth compared to receding signals. Participants judged the direction of an auditory motion cue presented with a visual looming cue (expanding disk), a visual receding cue (contracting disk), or visual stationary cue (static disk). Visual cues were presented either simultaneously with the auditory cue, or after 500 ms. We found increased levels of interference with looming visual cues compared to receding visual cues, compared to asynchronous presentation or stationary visual cues. The results could not be explained by the weaker subjective strength of the receding auditory stimulus, as in Experiment 2 the looming and receding auditory cues were matched for perceived strength. These results show that dynamic visual capture of auditory motion in the depth plane is modulated by an adaptive bias for looming compared to receding visual cues.
当视觉线索的运动方向导致同时呈现的听觉刺激的感知运动方向减弱或反转时，就会出现跨模态动态视觉捕获现象。已知与后退刺激相比，对逼近刺激存在感知偏差，并且最近观察到与后退线索相比，逼近线索的双模态反应时间更快（卡普等人，2009年）。当前的研究旨在测试与后退信号相比，视觉逼近线索是否与对深度听觉运动的更大动态捕获相关。参与者判断与视觉逼近线索（扩展圆盘）、视觉后退线索（收缩圆盘）或视觉静止线索（静态圆盘）同时呈现的听觉运动线索的方向。视觉线索与听觉线索同时呈现，或在500毫秒后呈现。我们发现，与异步呈现或静止视觉线索相比，与后退视觉线索相比，逼近视觉线索的干扰水平增加。实验2中逼近和后退听觉线索的感知强度相匹配，因此后退听觉刺激较弱的主观强度无法解释这些结果。这些结果表明，与后退视觉线索相比，对逼近的适应性偏差调节了深度平面中听觉运动的动态视觉捕获。
