Cognitive Neuroscience, Institute of Neuroscience and Medicine (INM-3), Research Centre Jülich, Wilhelm-Johnen-Str., 52428, Jülich, Germany.
Department of Neurology, University Hospital Cologne and Faculty of Medicine, University of Cologne, 50937, Cologne, Germany.
Sci Rep. 2021 Apr 12;11(1):7868. doi: 10.1038/s41598-021-87396-4.
The sensory dominance effect refers to the phenomenon that one sensory modality more frequently receives preferential processing (and eventually dominates consciousness and behavior) over and above other modalities. On the other hand, hand dominance is an innate aspect of the human motor system. To investigate how the sensory dominance effect interacts with hand dominance, we applied the adapted Colavita paradigm and recruited a large cohort of healthy right-handed participants (n = 119). While the visual dominance effect in bimodal trials was observed for the whole group (n = 119), about half of the right-handers (48%) showed a visual preference, i.e., their dominant hand effect manifested in responding to the visual stimuli. By contrast, 39% of the right-handers exhibited an auditory preference, i.e., the dominant hand effect occurred for the auditory responses. The remaining participants (13%) did not show any dominant hand preference for either visual or auditory responses. For the first time, the current behavioral data revealed that human beings possess a characteristic and persistent preferential link between different sensory modalities and the dominant vs. non-dominant hand. Whenever this preferential link between the sensory and the motor system was adopted, one dominance effect peaks upon the other dominance effect's best performance.
感觉优势效应是指一种现象，即一种感觉模态比其他模态更频繁地受到优先处理（最终主导意识和行为）。另一方面，手的优势是人类运动系统的固有方面。为了研究感觉优势效应如何与手的优势相互作用，我们应用了改编的 Colavita 范式，并招募了一大群健康的右利手参与者（n=119）。虽然在双模态试验中观察到了视觉优势效应（n=119），但大约一半的右利手者（48%）表现出视觉偏好，即他们的优势手效应表现在对视觉刺激的反应上。相比之下，39%的右利手者表现出听觉偏好，即优势手效应出现在对听觉反应的影响上。其余参与者（13%）在视觉或听觉反应中没有表现出任何优势手偏好。首次，当前的行为数据揭示了人类在不同感觉模态与优势手与非优势手之间存在一种特征性和持久的优先联系。只要这种感觉和运动系统之间的优先联系被采用，一种优势效应就会在另一种优势效应表现最佳时达到峰值。
