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Dissociating the Influence of Perceptual Biases and Contextual Artifacts Within Target Configurations During the Planning and Control of Visually Guided Action.
Motor Control ( IF 0.9 ) Pub Date : 2021-04-01 , DOI: 10.1123/mc.2020-0054
James W Roberts 1 , Nicholas Gerber 2 , Caroline J Wakefield 1 , Philip J Simmonds 1
Affiliation  

The failure of perceptual illusions to elicit corresponding biases within movement supports the view of two visual pathways separately contributing to perception and action. However, several alternative findings may contest this overarching framework. The present study aimed to examine the influence of perceptual illusions within the planning and control of aiming. To achieve this, we manipulated and measured the planning/control phases by respectively perturbing the target illusion (relative size-contrast illusion; Ebbinghaus/Titchener circles) following movement onset and detecting the spatiotemporal characteristics of the movement trajectory. The perceptual bias that was indicated by the perceived target size estimates failed to correspondingly manifest within the effective target size. While movement time (specifically, time after peak velocity) was affected by the target configuration, this outcome was not consistent with the direction of the perceptual illusions. These findings advocate an influence of the surrounding contextual information (e.g., annuli) on movement control that is independent of the direction predicted by the illusion.

中文翻译:

在视觉引导动作的计划和控制过程中,分离目标配置内的感知偏差和上下文伪像的影响。

知觉错觉未能引起运动中相应的偏见,支持了分别有助于感知和行动的两个视觉通路的观点。但是,一些替代性发现可能会质疑这一总体框架。本研究旨在检查知觉幻觉在瞄准计划和控制中的影响。为此,我们通过在运动开始后分别检测目标幻觉(相对大小对比幻觉; Ebbinghaus / Titchener圆)并检测运动轨迹的时空特征来操纵和测量计划/控制阶段。感知目标大小估计值指示的感知偏差未能在有效目标大小内相应地体现出来。在运动时间(具体来说,峰值速度之后的时间)受目标配置的影响,该结果与感知错觉的方向不一致。这些发现提倡周围的上下文信息(例如,环)对运动控制的影响,该影响独立于幻觉所预测的方向。
更新日期:2021-04-01
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