Tonelli Alessia, Burr David, Gori Monica, Alais David
School of Psychology, The University of Sydney, Sydney, Australia.
Unit for Visually Impaired People (UVIP), Istituto Italiano di Tecnologia, Genoa, Italy.
J Vis. 2025 Aug 1;25(10):10. doi: 10.1167/jov.25.10.10.
Multisensory processing is important for studying and understanding typical and atypical development; however, traditional paradigms involve numerous conditions and trials, making sessions long and tedious. A technique referred to as "continuous-tracking" has been introduced which can assess perceptual thresholds in a shorter time. We tested this technique in an audiovisual context by asking participants to track 1-minute audiovisual stimuli moving in a random walk. The stimuli could be visual, auditory, or audiovisual. In the last case, we had a congruent and incongruent condition with a spatiotemporal shift between the two stimuli, so either vision or audition led the walk by a given time. We further modulated the reliability of the visual stimulus to shift the weight toward the audio. We found a straightforward visual dominance regarding motion perception in audiovisual contexts. Regardless of its state, visual information interferes with auditory perception. Moreover, the continuous tracking yielded a new measurement of motion perception, the lag, giving information on the delay between visual and auditory information processing. Indeed, we observed that the tracking of auditory motion lagged relative to visual motion.
多感官处理对于研究和理解典型与非典型发育至关重要；然而，传统范式涉及众多条件和试验，使得实验环节冗长乏味。一种被称为“连续追踪”的技术已被引入，它能够在更短时间内评估感知阈值。我们在视听情境中测试了这项技术，要求参与者追踪以随机游走方式移动的1分钟视听刺激。刺激可以是视觉的、听觉的或视听的。在最后一种情况下，我们设置了两种刺激之间存在时空偏移的一致和不一致条件，使得视觉或听觉在给定时间内引领游走。我们进一步调节视觉刺激的可靠性，以将权重偏向音频。我们发现在视听情境中，运动感知方面存在明显的视觉主导性。无论其状态如何，视觉信息都会干扰听觉感知。此外，连续追踪产生了一种新的运动感知测量指标——滞后，它给出了视觉和听觉信息处理之间延迟的信息。实际上，我们观察到听觉运动的追踪相对于视觉运动存在滞后。
