PDF(Pubmed)
Abstract：
There is an increasing body of evidence suggesting that there are low-level perceptual processes involved in crossmodal correspondences. In this study, we investigate the involvement of the superior colliculi in three basic crossmodal correspondences: elevation/pitch, lightness/pitch, and size/pitch. Using a psychophysical design, we modulate visual input to the superior colliculus to test whether the superior colliculus is required for behavioural crossmodal congruency effects to manifest in an unspeeded multisensory discrimination task. In the elevation/pitch task, superior colliculus involvement is required for a behavioural elevation/pitch congruency effect to manifest in the task. In the lightness/pitch and size/pitch task, we observed a behavioural elevation/pitch congruency effect regardless of superior colliculus involvement. These results suggest that the elevation/pitch correspondence may be processed differently to other low-level crossmodal correspondences. The implications of a distributed model of crossmodal correspondence processing in the brain are discussed.
摘要：
越来越多的证据表明，跨模态对应关系涉及低级感知过程。在这项研究中,我们在三个基本的交叉模态对应关系中调查上丘的参与：海拔/螺距，亮度/间距，和大小/间距。使用心理物理设计，我们调节上丘的视觉输入，以测试行为交叉模态一致性效应是否需要上丘，以在未加速的多感觉辨别任务中表现出来。在抬高/俯仰任务中，要在任务中表现出行为抬高/俯仰一致性效果，就需要上丘的参与。在亮度/间距和尺寸/间距任务中，我们观察到与上丘受累无关的行为抬高/俯仰一致性效应。这些结果表明，高度/间距对应关系可能与其他低级交叉模态对应关系不同。讨论了大脑中跨模态通信处理的分布式模型的含义。
