Gianelli Claudia, Ranzini Mariagrazia, Marzocchi Michele, Rettore Micheli Leticìa, Borghi Anna M
Department of Psychology, University of Bologna, Bologna, Italy.
Cogn Process. 2012 Aug;13 Suppl 1:S185-8. doi: 10.1007/s10339-012-0483-7.
The link between numerical magnitude and mechanisms of spatial orienting has been underlined in an increasing number of studies. Similarly, the relationship between numerical magnitude and grasping actions has started to be investigated. The present study focuses on the influence of numerical magnitude processing in the free choice of the position of an object. Participants were presented with a digit (1-9 without 5) and were required to decide whether it was smaller or larger than 5. Then, they had to grasp a small cube and change its position before vocally responding "higher" or "lower". Results showed that in the initial phase of the grasp movement, the grip aperture was modulated by the numerical magnitude. Moreover, participants shifted the position of the cube more leftward with smaller digits compared with larger ones, and they tended to position the object closer to themselves with smaller digits compared with larger ones. These results extend the previous findings indicating that the processing of magnitude is tightly related to the mechanisms of spatial orienting that subserve action execution.
越来越多的研究强调了数字大小与空间定向机制之间的联系。同样，数字大小与抓握动作之间的关系也开始受到研究。本研究聚焦于数字大小处理对物体位置自由选择的影响。向参与者呈现一个数字（1至9，不包括5），并要求他们判断该数字比5小还是比5大。然后，他们必须抓取一个小立方体并改变其位置，之后口头回答“大于”或“小于”。结果表明，在抓握动作的初始阶段，握力孔径受数字大小的调节。此外，与较大数字相比，参与者在面对较小数字时会将立方体的位置更多地向左移动，并且与较大数字相比，他们倾向于将物体放置得离自己更近。这些结果扩展了先前的发现，表明大小处理与服务于动作执行的空间定向机制紧密相关。
