Action for perception:: A motor-visual attentional effect
Action for perception:: A motor-visual attentional effect
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DOI：
10.1037/0096-1523.25.6.1673
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发表时间：
1999-12-01
影响因子：
2.1
通讯作者：
Umiltà, C
中科院分区：
文献类型：
--
作者：
Craighero, L;Fadiga, L;Umiltà, C
五个实验考察了抓握动作的准备是否会影响对视觉刺激的检测和辨别。正常人被要求准备抓住一根杆子，然后在呈现视觉刺激时尽可能快地抓住它。根据视觉刺激与被握杆的内在属性的共享程度，将其分为“一致的”和“不一致的”。结果表明，对一致视觉刺激的反应时比对不一致视觉刺激的反应时快。这些数据表明，准备作用于一个物体会更快地处理与该物体一致的刺激。当参与者在准备抓握之后，突然被指示抑制准备好的抓握运动，并用不同的运动效应器做出反应时，也存在同样的促进作用。作者认为，这些发现可能代表了注意前期运动理论的扩展，从将注意力定向到空间位置，到将注意力定向到可抓到的物体上。
Five experiments investigated whether preparation of a grasping movement affects detection and discrimination of visual stimuli. Normal human participants were required to prepare to grasp a bar and then to grasp it as fast as possible on presentation of a visual stimulus. On the basis of the degree of sharing of their intrinsic properties with those of the to-be-grasped bar, visual stimuli were categorized as "congruent" or "incongruent." Results showed that grasping reaction times to congruent visual stimuli were faster than reaction times to incongruent ones. These data indicate that preparation to act on an object produces faster processing of stimuli congruent with that object. The same facilitation was present also when, after the preparation of hand grasping, participants were suddenly instructed to inhibit the prepared grasping movement and to respond with a different motor effector. The authors suggest that these findings could represent an extension of the premotor theory of attention, from orienting of attention to spatial locations to orienting of attention to graspable objects.