The plasticity of near space: Evidence for contraction
The plasticity of near space: Evidence for contraction
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DOI：
10.1016/j.cognition.2009.05.011
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发表时间：
2009-09-01
期刊：
影响因子：
3.4
通讯作者：
Longo, Matthew R.
中科院分区：
文献类型：
--
作者：
Lourenco, Stella F.;Longo, Matthew R.
近空间和远空间之间的区别已经很好地确立了，这种区别与臂长之间的关系也是如此。最近的研究为近空间的可塑性提供了证据，表明有可能通过使用工具来扩大其范围（“大小”）。在本研究中，我们研究了相反的效应，即近空间的收缩是否来自于增加对线平分任务所涉及的努力。成年参与者在不同的距离上平分线，在某些情况下，他们戴着重物。在实验1中，我们对手臂进行称重（手腕重量），而在实验2中，我们使用了更一般的体重（沉重的背包）。与之前的研究一样，无阻碍的参与者在最近的距离上平分线时表现出向左偏倚，随着距离的增加，偏倚向右转移。对于手腕重量，而不是沉重的背包，参与者在最近的距离表现出更多的向右倾斜，并且随着距离的增加而逐渐向右移动，好像最近的位置被表示为更远。这些结果表明，当与手臂相关时，增加的努力可以减少近空间的大小，为近空间表征的一般对称可塑性提供支持。(C) 2009 Elsevier B.V.版权所有
The distinction between near space and the space farther away has been well established, as has the relation of this distinction to arm length. Recent studies provide evidence for the plasticity of near space, showing that it is possible to expand its extent ("size") through tool-use. In the present study, we examine the converse effect, whether contraction of near space results from increasing the effort involved on a line bisection task. Adult participants bisected lines at different distances, while, in some cases, wearing weights. In Experiment 1, the arms, specifically, were weighted (wrist weights), and in Experiment 2, more general body weights were used (heavy backpack). As in previous studies, unencumbered participants showed leftward bias when bisecting lines at the closest distances and a rightward shift in bias with increasingly farther distances. With wrist weights, but not a heavy backpack, participants showed more rightward bias at the closest distances, and a more gradual rightward shift with increasing distance, as if the nearest locations were represented as being farther away. These results suggest that increased effort, when specifically related to the arm, can serve to reduce the size of near space, providing support for the generally symmetrical plasticity of near space representations. (C) 2009 Elsevier B.V. All rights reserved.