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Effects of Audiovisual Presentations on Visual Localization Errors: One or Several Multisensory Mechanisms?
Multisensory Research ( IF 1.6 ) Pub Date : 2021-04-20 , DOI: 10.1163/22134808-bja10048
Cristina Jordão Nazaré,Armando Mónica Oliveira

The present study examines the extent to which temporal and spatial properties of sound modulate visual motion processing in spatial localization tasks. Participants were asked to locate the place at which a moving visual target unexpectedly vanished. Across different tasks, accompanying sounds were factorially varied within subjects as to their onset and offset times and/or positions relative to visual motion. Sound onset had no effect on the localization error. Sound offset was shown to modulate the perceived visual offset location, both for temporal and spatial disparities. This modulation did not conform to attraction toward the timing or location of the sounds but, demonstrably in the case of temporal disparities, to bimodal enhancement instead. Favorable indications to a contextual effect of audiovisual presentations on interspersed visual-only trials were also found. The short sound-leading offset asynchrony had equivalent benefits to audiovisual offset synchrony, suggestive of the involvement of early-level mechanisms, constrained by a temporal window, at these conditions. Yet, we tentatively hypothesize that the whole of the results and how they compare with previous studies requires the contribution of additional mechanisms, including learning-detection of auditory-visual associations and cross-sensory spread of endogenous attention.

中文翻译:

视听演示对视觉定位错误的影响:一种或几种多感官机制?

本研究探讨了声音的时空特性在空间定位任务中调节视觉运动处理的程度。要求参与者确定移动的视觉目标意外消失的位置。在不同的任务中,伴随声音在对象内的发生,偏移时间和/或相对于视觉运动的位置在因果关系上会发生变化。声音发作对定位错误没有影响。对于时间和空间上的差异,声音偏移显示出可以调节感知到的视觉偏移位置。这种调制并不符合对声音的时间或位置的吸引力,但是,在时间差异的情况下,显然可以采用双峰增强。还发现了对穿插式仅视觉试验的视听演示的情境效果的有利指示。短的声音引导偏移异步与视听偏移同步具有相同的好处,这表明在这些情况下,早期机制的参与受到时间窗口的限制。然而,我们初步假设整个结果以及它们如何与先前的研究进行比较需要其他机制的贡献,包括学习检测听觉-视觉联想以及内在注意的交叉感觉传播。
更新日期:2021-04-20
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