Department of Medicine and Surgery, University of Parma, Parma, Italy.
Department of Psychology, University of Milano-Bicocca, Milano, Italy.
PLoS One. 2024 Nov 4;19(11):e0301737. doi: 10.1371/journal.pone.0301737. eCollection 2024.
Behavioral perception-action dissociations are widely used to test models of high-level vision, but debates concerning their interpretation have underestimated the role of multisensory mechanisms in such tests. Sensorimotor tasks engage multisensory processing in fundamentally different ways than perceptual tasks, and these differences can modulate dissociations in different ways based on task features. To test this idea, we compared perception and action using a well-understood size-contrast effect, the Uznadze illusion, and manipulated both unimodal and crossmodal stimulation as well as conditions that are known to favor or hinder multisensory integration. Results demonstrated that similar or dissociable effects on perception and action can be observed depending on factors that are known to affect multisensory processing. Specifically, such factors can cause a visual task to be affected by the illusion or remain fully unaffected, whereas a visuomotor task can be affected by the illusion, remain immune from the illusion, or, unexpectedly, even show a clear reverse effect. These findings provide a novel perspective on a long standing debate in behavioral cognitive neuroscience.
行为感知-动作分离广泛用于测试高层视觉模型，但关于其解释的争论低估了多感觉机制在这些测试中的作用。感觉运动任务以与感知任务根本不同的方式参与多感觉处理，这些差异可以根据任务特征以不同的方式调节分离。为了检验这一观点，我们使用了一种众所周知的大小对比效应，即乌扎纳德错觉，比较了感知和动作，并对单模态和跨模态刺激以及已知有利于或阻碍多感觉整合的条件进行了操纵。结果表明，根据已知影响多感觉处理的因素，可以观察到感知和动作上相似或分离的效应。具体来说，这些因素可能导致视觉任务受到错觉的影响或完全不受影响，而视动任务可能受到错觉的影响，不受错觉的影响，或者出人意料地，甚至表现出明显的反向效应。这些发现为行为认知神经科学中一个长期存在的争论提供了一个新的视角。
