Can ongoing movements be guided by allocentric visual information when the target is visible?
Can ongoing movements be guided by allocentric visual information when the target is visible?
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DOI：
10.1167/jov.21.1.6
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发表时间：
2021-01-04
影响因子：
1.8
通讯作者：
Brenner E
中科院分区：
文献类型：
--
作者：
Crowe EM;Bossard M;Brenner E
人们使用自我中心（对象对自我）和他中心（对象对对象）的空间信息与世界互动。指导正在进行的行动的非中心信息的证据来自于研究，在这些研究中，当其他物体被移动时，人们到达以前看到的目标。由于当目标被移除时，自我中心的位置判断可能会减弱或改变，因此我们寻求在目标仍然可见时人们可能从依赖非自我中心信息中受益的条件。我们使用了一个任务，要求参与者拦截目标，这些目标使用光标在屏幕上移动，光标代表他们的手指，但在不同的平面上移动了不同的量。在每次尝试中，我们单独或同时扰动目标、光标或背景，以使它们的相对位置不会改变，也不需要调整正在进行的移动。避免对这种同时扰动作出反应的一个明显方法是依赖于非中心信息。依赖自我中心的信息会产生类似于对三个孤立扰动的综合反应的反应。尽管手指和光标的移动方式不同，但手的反应与对孤立扰动的反应一致。当同时扰动重复多次时，这种反应仍然存在，这表明参与者几乎不依赖于allocentric空间信息来控制他们正在进行的视觉引导动作。
People use both egocentric (object-to-self) and allocentric (object-to-object) spatial information to interact with the world. Evidence for allocentric information guiding ongoing actions stems from studies in which people reached to where targets had previously been seen while other objects were moved. Since egocentric position judgments might fade or change when the target is removed, we sought for conditions in which people might benefit from relying on allocentric information when the target remains visible. We used a task that required participants to intercept targets that moved across a screen using a cursor that represented their finger but that moved by a different amount in a different plane. During each attempt, we perturbed the target, cursor, or background individually or all three simultaneously such that their relative positions did not change and there was no need to adjust the ongoing movement. An obvious way to avoid responding to such simultaneous perturbations is by relying on allocentric information. Relying on egocentric information would give a response that resembles the combined responses to the three isolated perturbations. The hand responded in accordance with the responses to the isolated perturbations despite the differences between how the finger and cursor moved. This response remained when the simultaneous perturbation was repeated many times, suggesting that participants hardly relied upon allocentric spatial information to control their ongoing visually guided actions.
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