Bourgeois Jérémy, Coello Yann
Research Unit in Cognitive and Affective Sciences, University Lille Nord de France, B.P. 60149, 59653 Villeneuve d'Ascq Cedex, France.
Atten Percept Psychophys. 2012 Aug;74(6):1268-83. doi: 10.3758/s13414-012-0316-x.
Target selection for action depends not only on the egocentric location of objects estimated from retinal and extraretinal variables, but also on the assessment of current action possibilities. In the present study, we investigated the effect of altering sensorimotor anticipation processes on subsequent perceptual estimates of reachability. To do so, we conducted two experiments in which we changed the relation between visual distance and movement amplitude. Experiment 1 showed that iterative visuomotor adaptation to distorted visual feedback (in steps of ±15 mm, up to a total adaptation of ±75 mm) led to a congruent variation of perceived reachable space, although the first introduction of the shifted visual feedback produced a reduction of perceived reachable space whatever the direction of the feedback shift. Experiment 2 showed that increasing uncertainty about visuomotor performances, by providing a visual feedback randomly shifted in depth (±7.5 mm), produced the same reduction of perceived reachable space in the absence of visuomotor adaptation. Taken together, these data suggest that the visual perception of reachable space depends on a motor-related perceptual system, which is affected by both visuomotor recalibration and reliability of the visuomotor system.
行动的目标选择不仅取决于根据视网膜和视网膜外变量估计的物体的自我中心位置，还取决于对当前行动可能性的评估。在本研究中，我们调查了改变感觉运动预期过程对后续可达性感知估计的影响。为此，我们进行了两个实验，其中我们改变了视觉距离和运动幅度之间的关系。实验1表明，对失真视觉反馈（以±15毫米的步长，最大总适应量为±75毫米）进行迭代视觉运动适应会导致可感知可达空间的一致变化，尽管无论反馈偏移的方向如何，首次引入偏移的视觉反馈都会导致可感知可达空间的减少。实验2表明，通过提供在深度上随机偏移（±7.5毫米）的视觉反馈来增加视觉运动表现的不确定性，在没有视觉运动适应的情况下会产生相同的可感知可达空间的减少。综上所述，这些数据表明，可感知可达空间的视觉感知取决于一个与运动相关的感知系统，该系统受视觉运动重新校准和视觉运动系统可靠性的影响。
