Takahashi Kohske, Watanabe Katsumi
Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, Japan.
J Vis. 2010 Apr 27;10(4):11.1-13. doi: 10.1167/10.4.11.
Visual competition refers to the spontaneous change of the subjective perception of ambiguous visual patterns. We investigated how implicit and explicit auditory inputs affect the temporal characteristics of perceptual alternation and the interpretation bias in ambiguous visual patterns. Participants traced the perceived direction of apparent visual motion, while two task-irrelevant auditory tones were alternately presented. In the pre- and post-learning sessions, ambiguous apparent motion (seen as moving vertically or horizontally) was presented. In the learning session, disambiguated vertical and horizontal apparent motions were alternately presented and switched in synchronization with the changes in auditory tones. The results showed that the temporal intervals of perceptual alternation from the auditory switches were reduced after the participants experienced the synchronized audiovisual switches, even when the auditory switches were not consciously detectable. The magnitude of the effect was comparable for the implicit and explicit auditory switches. Neither explicit nor implicit auditory tones biased the interpretation of the ambiguous visual motion. These results suggest that auditory inputs implicitly affect the temporal characteristics of perceptual alternation after participants experience synchronized audiovisual events.
视觉竞争指的是对模糊视觉模式的主观感知的自发变化。我们研究了内隐和外显听觉输入如何影响感知交替的时间特征以及在模糊视觉模式中的解释偏差。参与者追踪明显视觉运动的感知方向，同时交替呈现两个与任务无关的听觉音调。在学习前和学习后的阶段，呈现模糊的明显运动（看起来垂直或水平移动）。在学习阶段，明确的垂直和水平明显运动交替呈现，并与听觉音调的变化同步切换。结果表明，在参与者经历了同步视听切换后，即使听觉切换在意识上无法察觉，来自听觉切换的感知交替的时间间隔也会缩短。内隐和外显听觉切换的效果大小相当。外显和内隐听觉音调都没有偏向对模糊视觉运动的解释。这些结果表明，在参与者经历同步视听事件后，听觉输入会对内隐感知交替的时间特征产生影响。
