Size perception is known to influence our usual interactions with environment. Numerous studies highlighted that during the visual presentation of an object, the properties of manual actions vary as a function of this object's size. In order to better understand the dynamic variations of relationships between size perception and action, we used an experimental paradigm consisting in two phases. During a previous implicit learning phase, a manual response (right or left) was specifically associated with the appearance of a large or small stimulus. During further test phase, participants were required to prepare a response while discriminating the color of a stimulus (GO/No GO task). We observed that the response execution was faster when the size of the stimulus was congruent with the size that had been associated to this response (during implicit learning phase). These results suggest that when a response usually co-occurs with visual stimuli characterized by a specific size pattern, the response and the size pattern become integrated. Any subsequent preparation and execution of this action are therefore influenced by the reactivation of this visual pattern. This result brings out new insights on how sensorimotor interactions may modulate the ability to anticipate perceptive size variations in the environment.

译文

众所周知,大小感知会影响我们通常与环境的互动。大量研究强调,在对象的视觉呈现过程中,手动动作的属性随对象大小的变化而变化。为了更好地理解大小感知和动作之间关系的动态变化,我们使用了一个由两个阶段组成的实验范例。在先前的内隐学习阶段,手动响应 (右或左) 与大或小刺激的出现特别相关。在进一步的测试阶段,要求参与者在区分刺激颜色的同时准备响应 (GO/No GO任务)。我们观察到,当刺激的大小与与该响应相关的大小一致时 (在隐式学习阶段),响应执行更快。这些结果表明,当响应通常与以特定大小模式为特征的视觉刺激同时发生时,响应和大小模式将成为一体。因此,此操作的任何后续准备和执行都受到此视觉模式重新激活的影响。该结果为感觉运动相互作用如何调节预测环境中感知大小变化的能力带来了新的见解。

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