Dissociating mechanism underlying selection history bias for goal-directed reaching movements
Dissociating mechanism underlying selection history bias for goal-directed reaching movements
复制标题
目标导向的到达运动的选择历史偏差背后的分离机制
DOI：
10.1167/jov.21.9.2668
复制
发表时间：
2021
影响因子：
1.8
通讯作者：
Makwana M
中科院分区：
文献类型：
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作者：
Makwana M
众所周知，选择历史会独立于自上而下的目标和自下而上的显着性来影响行为表现。然而，目标易化和分心抑制等潜在过程对目标导向的到达行为的确切贡献尚不清楚。为了解决这个问题，我们使用了伸展跟踪和计算建模方法。参与者在三个均匀的干扰物中到达一个奇怪的颜色的目标，而我们记录了他们连续到达的轨迹。连续轨迹提供了一种行为测量，可以在目标选择展开时捕捉目标和干扰项竞争之间的在线动态。为了评估目标易化和干扰抑制对REACH目标选择的相对贡献，除了传统的全重复(在后续实验中重复目标和干扰物的颜色)和全交换条件(在后续的实验中交换目标和干扰物的颜色)之外，我们增加了部分重复和部分交换条件。在部分重复条件下，目标颜色保持不变，而分心物体是新的颜色，反之亦然；在部分交换条件下，目标颜色是前一次实验的分心物体颜色，而分心物体是新的颜色，反之亦然(Emer等，2010)。为了评估受历史影响的目标选择偏差，我们比较了不同条件下的到达曲率的方向和大小：朝向分心物的到达曲率减少表示目标选择的便利性。与前人的研究一致(Moher&Song，2014)，在全重复条件下，REACH目标选择最容易，而在全交换条件下，REACH目标选择最容易中断。我们还观察到，在部分交换条件下比在部分重复条件下更多地增加了指向干扰项的到达曲率。这一结果表明，在试验中保持一个与其角色(作为目标或分心物)相关的特征对后续的目标选择更有利。为了量化目标促进和分心抑制之间的动态相互作用，我们目前正在扩展神经学启发的CoRLEGO(Choice-Reach-With-LEGO-Arm-Robot)模型(Strauss等人，2015)。
Selection history has been known to influence behavioral performance independent of top-down-goals and bottom-up-saliency. However, the precise contribution of underlying processes like target facilitation and distractor inhibition for goal-directed reaching action is unclear. To address this, we used a reach-tracking and computational modelling approach. Participants reached an odd-colored target among three homogeneous distractors, while we recorded their continuous reach trajectory. Continuous trajectory provides a behavioral measure that captures the online dynamics between target and distractor competition as the target selection unfolds. To assess the relative contributions of target facilitation and distractor inhibition on reach target selection, in addition to conventional full-repetition (repeating target and distractor colors on subsequent trials) and full-swap conditions (swapping target and distractor colors on subsequent trials), we added the partial-repetition and partial-swap conditions. In the partial-repetition conditions, the target color remained unchanged, while the distractor was in new color, or vice versa; in the partial-swap conditions, target color was the distractor color of the preceding trial while distractor was in new color, or vice versa (Eimer et al., 2010). To evaluate target selection bias modulated by history, we compared the direction and the magnitude of reach curvature across conditions: a decreased reach curvature towards a distractor indicates facilitation of target selection. In accord with prior studies (Moher & Song, 2014), reach target selection was most facilitated in the full-repeat condition while most interrupted in the full-swap condition. We also observed that more increased reach curvature towards distractors in the partial-swap conditions than in the partial-repetition conditions. This result suggests that maintaining a feature in association with its role (as target or distractor) across trials is more beneficial for subsequent target selection. To quantify the dynamic interaction between target facilitation and distractor suppression, we are currently extending the neurologically inspired CoRLEGO (Choice-reaching-with-LEGO-arm-robot) model (Strauss et al., 2015).