Task-specific engagement of object-based and space-based attention with spatiotemporally defined objects.
Task-specific engagement of object-based and space-based attention with spatiotemporally defined objects.
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DOI：
10.3758/s13414-020-02201-0
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发表时间：
2021-05
期刊：
影响因子：
--
通讯作者：
Moore CM
中科院分区：
文献类型：
--
作者：
Zheng Q;Moore CM
我们使用一种称为 Ternus 运动的模糊视运动形式来隔离基于对象和基于空间的注意力的影响，并探索它们之间的功能差异。两帧水平对齐的圆盘在帧之间移动一个位置，在时间上被短或长的刺激间间隔 (ISI) 分开。短 ISI 显示被视为元素运动，其中一个圆盘似乎跳过了另外两个圆盘。长 ISI 显示被视为群体运动，其中所有三个圆盘似乎一起移动。由于元素和组运动意味着相互排斥的对象结构，因此向每一帧中的一个圆盘添加刺激（例如，小间隙）会创建正交对象和位置状态（相同或不同）的条件，具体取决于 ISI。我们使用了两个具有不同功能需求的任务，一个是识别任务（实验 1 和 3a），其中观察者对最终刺激的单个属性做出反应，另一个是比较任务（实验 2 和 3b），其中观察者比较两个刺激的两个属性。可靠的特定于对象的效应仅发生在比较任务中，而特定于位置的效应发生在两个任务中。这些结果证实，注意力可以与空间位置分开地集中到物体上，反之亦然，而且，根据任务的处理需求，基于物体和基于空间的注意力的参与方式不同。
We used a form of ambiguous apparent motion known as Ternus motion to isolate the effects of object-based and space-based attention, and to explore functional differences between them. Two frames of horizontally aligned disks that were shifted by one position between frames, were temporally separated by either a short or a long inter-stimulus interval (ISI). Short ISI displays were perceived as element motion where one disk appeared to jump across the other two. Long-ISI displays were perceived as group motion where all three disks appeared to move together. Because element and group motion imply mutually exclusive object structures, adding stimuli (e.g., a small gap) to one disk in each frame created conditions of orthogonal object and location status (same or different), depending on ISI. We used two tasks with different functional demands, an identification task (Experiments 1 and 3a) in which observers responded to a single attribute of the final stimulus, and a comparison task (Experiments 2 and 3b) in which observers compared two attributes across two stimuli. Reliable object-specific effects occurred only with the comparison task, whereas location-specific effects occurred with both tasks. These results confirm that attention can be directed to objects separately from spatial locations and vice versa, and moreover, that object-based and space-based attention are engaged differently depending on the processing demands of the task.
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影响因子：
3.5
作者：
Moore, CM;Fulton, C
通讯作者：
Fulton, C
影响因子：
--
作者：
Pelli, DG
通讯作者：
Pelli, DG
影响因子：
3.4
作者：
Mitroff, SR;Scholl, BJ;Wynn, K
通讯作者：
Wynn, K
影响因子：
4.1
作者：
EGLY, R;DRIVER, J;RAFAL, RD
通讯作者：
RAFAL, RD
影响因子：
1.8
作者：
Ernst, Zachary Raymond;Palmer, John;Boynton, Geoffrey M.
通讯作者：
Boynton, Geoffrey M.