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首页> 外文期刊>Brain and cognition >More far is more right: Manual and ocular line bisections, but not the Judd illusion, depend on radial space
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More far is more right: Manual and ocular line bisections, but not the Judd illusion, depend on radial space

机译：更远更正确：手动和眼线平分，而不是Judd幻觉，取决于径向空间

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Line bisection studies generally find a left-to-right shift in bisection bias with increasing distance between the observer and the target line, which may be explained by hemispheric differences in the processing of proximo distal information. In the present study, the segregation between near and far space was further characterized across the motor system and contextual cues. To this aim, 20 right-handed participants were required to perform a manual bisection task of simple lines presented at three different distances (60, 90, 120 cm). Importantly, the horizontal spatial location of the line was manipulated along with the viewing distance to investigate more deeply the hemispheric engagement in the transition from near to far space. As the motoric component of the manual task producing activations of left premotor and motor areas may be partially responsible for the observed transition, participants were also involved in an ocular bisection task. Further, participants were required to bisect Judd variants of the target lines, which are known to elicit a Miiller-Lyer-type illusion. Since the Judd illusion depends on areas in the ventral visual stream, we predicted that line bisections of Judd-type lines would be unaffected by viewing distance. Results showed that manual bisection of simple lines was modulated separately by viewing distance and the hemispace of presentation, with this pattern being similar for ocular bisection. Critically, bisections in the Judd illusion task were not modulated by viewing distance, whether performed by hand or by eye. Overall, these findings support the hypothesis that the right hemisphere plays a dominant role in the processing of space dose to the body. They also present novel evidence for a general reduction of this dominance at farther distances, whether hand motor actions are involved or not. Finally, our study documents a dissociation between the processing of pure visuospatial information and that of a visual illusion as a function of viewing distance, supporting more generally the dorsalear space and the ventral/far space segregation.
机译：线平分线研究通常会发现，随着观察者与目标线之间距离的增加，线平分线偏向左移到右移，这可以用近端远端信息处理中的半球差异来解释。在本研究中，近空间和远空间之间的隔离在整个运动系统和上下文提示中得到了进一步的表征。为此，需要20位惯用右手的参与者执行以三种不同距离（60、90、120 cm）显示的简单线条的手动平分任务。重要的是，操纵线的水平空间位置以及观察距离来更深入地研究从近空间到远空间过渡中的半球接合。由于产生左前运动和运动区域激活的手动任务的运动成分可能部分负责观察到的过渡，因此参与者也参与了眼平分任务。此外，要求参与者将目标线的贾德变体一分为二，已知它们会引起米勒-里尔式错觉。由于Judd错觉取决于腹侧视觉流中的区域，因此我们预测Judd型线的线剖分将不受观看距离的影响。结果表明，简单线的手动平分分别通过观看距离和呈现的半空间进行调节，这种模式与眼平分相似。至关重要的是，无论是用手还是肉眼观察，贾德幻觉任务中的二等分都没有通过观察距离来调节。总体而言，这些发现支持以下假设：右半球在处理人体空间剂量中起主要作用。他们还提出了新的证据，表明无论是否牵手运动，这种优势在更远的距离上都会普遍降低。最后，我们的研究记录了视空间信息与视错觉的处理之间的分离，该分离是视距的函数，更普遍地支持了背/近空间和腹/远空间的分离。

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