School of Psychology, The University of Queensland, St. Lucia, Queensland, 4072, Australia.
Atten Percept Psychophys. 2024 Apr;86(3):931-941. doi: 10.3758/s13414-024-02866-x. Epub 2024 Feb 28.
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.
越来越多的证据表明，跨模态对应存在低级感知过程。在这项研究中，我们调查了上丘在三种基本的跨模态对应关系中的参与情况：高度/音高、明度/音高和大小/音高。我们使用心理物理学设计来调制上丘的视觉输入，以测试上丘是否需要在非加速多感觉辨别任务中表现出行为跨模态一致性效应。在高度/音高任务中，上丘的参与对于在任务中表现出行为高度/音高一致性效应是必需的。在明度/音高和大小/音高任务中，无论上丘的参与情况如何，我们都观察到了行为高度/音高一致性效应。这些结果表明，高度/音高对应可能与其他低级跨模态对应不同。讨论了大脑中跨模态对应处理分布式模型的含义。
