Grasping numbers: evidence for automatic influence of numerical magnitude on grip aperture

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• 作者：Gal Namdar (1)
  Joseph Tzelgov (1) (2)
  Daniel Algom (3)
  Tzvi Ganel (1)
  
• 关键词：Visually guided action ; Grasping ; Motor planning/programming ; Motor control ; Numerical cognition ; Automatic processing ; Selective attention
• 刊名：Psychonomic Bulletin & Review
• 出版年：2014
• 出版时间：June 2014
• 年：2014
• 卷：21
• 期：3
• 页码：830-835
• 全文大小：
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• 作者单位：Gal Namdar (1)
  Joseph Tzelgov (1) (2)
  Daniel Algom (3)
  Tzvi Ganel (1)
  
  1. Department of Psychology, Ben-Gurion University of the Negev, Beer-Sheva, 84105, Israel
  2. Department of Brain and Cognitive Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel
  3. School of Psychological Sciences, Tel-Aviv University, Tel-Aviv, Israel
  
• ISSN：1531-5320

文摘

Previous research has shown that the fingers-aperture during grasp is affected by the numerical values of numbers embedded in the grasped objects: Numerically larger digits lead to larger grip apertures than do numerically smaller digits during the initial stages of the grasp. The relationship between numerical magnitude and visuomotor control has been taken to support the idea of a common underlying neural system mediating the processing of magnitude and the computation of object size for motor control. The purpose of the present study was to test whether the effect of magnitude on motor preparation is automatic. During grasping, we asked participants to attend to the colors of the digit while ignoring numerical magnitude. The results showed that numerical magnitude affected grip aperture during the initial stages of the grasp, even when magnitude information was irrelevant to the task at hand. These findings suggest that magnitude affects grasping preparation in an automatic fashion.