The Binding Problem after an eye movement
The Binding Problem after an eye movement
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DOI：
10.3758/s13414-019-01739-y
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发表时间：
2020-01-01
影响因子：
1.7
通讯作者：
Golomb, Julie D.
中科院分区：
文献类型：
--
作者：
Dowd, Emma Wu;Golomb, Julie D.
空间注意力被认为是将特征粘合在一起的“粘合剂”（例如，Treisman & Gelade, 1980, Psychology, 12[1], 97-136），但注意力是动态的，不断地跨越多个目标和位置。例如，当一个人移动眼睛时，相对于眼睛（视网膜主题）编码的视觉输入必须快速更新，以维持稳定的以世界为中心（空间主题）的表示。在这里，我们研究了眼球扫视运动后空间注意力的动态更新如何影响对象特征绑定。扫视后，立即向参与者同时呈现四个彩色定向条（其中一个位于预先确定的空间目标位置），并指示参与者重现目标项目的颜色和方向。通过将概率混合模型应用于特征错误的联合分布来评估对象-特征绑定：目标项目的特征报告可以是相关的（因此绑定在一起）或独立的。我们发现，与在没有眼球运动的情况下保持注意力相比，眼球运动后的注意力更新会产生更多的独立错误，包括错觉连接，其中空间主题目标位置处的项目的一个特征与初始视网膜主题位置处的项目的另一个特征错误结合。这些发现表明，即使只有一个时空位置与任务相关，空间注意力（以及因此对象特征绑定）在眼球运动之间和之后也是可塑的，这加剧了眼球运动对绑定问题和视觉稳定性带来的挑战。
Spatial attention is thought to be the "glue" that binds features together (e.g., Treisman & Gelade, 1980, Psychology, 12[1], 97-136)-but attention is dynamic, constantly moving across multiple goals and locations. For example, when a person moves her eyes, visual inputs that are coded relative to the eyes (retinotopic) must be rapidly updated to maintain stable world-centered (spatiotopic) representations. Here, we examined how dynamic updating of spatial attention after a saccadic eye movement affects object-feature binding. Immediately after a saccade, participants were simultaneously presented with four colored and oriented bars (one at a precued spatiotopic target location) and instructed to reproduce both the color and orientation of the target item. Object-feature binding was assessed by applying probabilistic mixture models to the joint distribution of feature errors: feature reports for the target item could be correlated (and thus bound together) or independent. We found that compared with holding attention without an eye movement, attentional updating after an eye movement produced more independent errors, including illusory conjunctions, in which one feature of the item at the spatiotopic target location was misbound with the other feature of the item at the initial retinotopic location. These findings suggest that even when only one spatiotopic location is task relevant, spatial attention-and thus object-feature binding-is malleable across and after eye movements, heightening the challenge that eye movements pose for the binding problem and for visual stability.