Acoustic facilitation of object movement detection during self-motion
Acoustic facilitation of object movement detection during self-motion
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DOI：
10.1098/rspb.2010.2757
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发表时间：
2011-09-22
影响因子：
4.7
通讯作者：
Vaina, L. M.
中科院分区：
文献类型：
--
作者：
Calabro, F. J.;Soto-Faraco, S.;Vaina, L. M.
在人类以及大多数动物物种中，物体运动的感知对于与周围环境的成功交互至关重要。然而，当观察者也移动时，各种运动分量的视网膜投影彼此相加，并且提取准确的对象运动在计算上变得具有挑战性。最近的心理物理学研究表明，观察者使用流解析机制来估计并从光流场中减去自运动。我们研究了并发的声学线索的运动是否可以促进视觉流解析，从而提高模拟自我运动过程中的移动物体的检测。参与者确定一个对象（目标），向前或向后移动的视觉场景包含九个相同的纹理对象模拟向前观察者翻译。我们发现，空间共定位，方向一致，移动听觉刺激增强对象运动检测。有趣的是，在视觉任务中表现不佳的受试者从移动听觉刺激中获益更多。当听觉刺激没有共同定位的视觉目标，检测率的改善是微弱的。两者合计，这些结果表明，解析对象运动自运动诱导的光流可以操作多感官对象表示。
In humans, as well as most animal species, perception of object motion is critical to successful interaction with the surrounding environment. Yet, as the observer also moves, the retinal projections of the various motion components add to each other and extracting accurate object motion becomes computationally challenging. Recent psychophysical studies have demonstrated that observers use a flow-parsing mechanism to estimate and subtract self-motion from the optic flow field. We investigated whether concurrent acoustic cues for motion can facilitate visual flow parsing, thereby enhancing the detection of moving objects during simulated self-motion. Participants identified an object (the target) that moved either forward or backward within a visual scene containing nine identical textured objects simulating forward observer translation. We found that spatially co-localized, directionally congruent, moving auditory stimuli enhanced object motion detection. Interestingly, subjects who performed poorly on the visual-only task benefited more from the addition of moving auditory stimuli. When auditory stimuli were not co-localized to the visual target, improvements in detection rates were weak. Taken together, these results suggest that parsing object motion from self-motion-induced optic flow can operate on multisensory object representations.