Bekkering Harold, Neggers Sebastiaan F W
Department of Cognition and Action, Max Planck Institute for Psychological Research, Munich, Germany.
Psychol Sci. 2002 Jul;13(4):370-4. doi: 10.1111/j.0956-7976.2002.00466.x.
The influence of action intentions on visual selection processes was investigated in a visual search paradigm. A predefined target object with a certain orientation and color was presented among distractors, and subjects had to either look and point at the target or look at and grasp the target. Target selection processes prior to the first saccadic eye movement were modulated by the different action intentions. Specifically, fewer saccades to objects with the wrong orientation were made in the grasping condition than in the pointing condition, whereas the number of saccades to an object with the wrong color was the same in the two conditions. Saccadic latencies were similar under the different task conditions, so the results cannot be explained by a speed-accuracy trade-off. The results suggest that a specific action intention, such as grasping, can enhance visual processing of action-relevant features, such as orientation. Together the findings support the view that visual attention can be best understood as a selection-for-action mechanism.
在视觉搜索范式中研究了动作意图对视觉选择过程的影响。在干扰物中呈现一个具有特定方向和颜色的预定义目标物体，受试者必须要么看向并指向目标，要么看向并抓取目标。第一次扫视眼动之前的目标选择过程受到不同动作意图的调节。具体而言，在抓取条件下，对方向错误的物体的扫视次数比指向条件下少，而在两种条件下，对颜色错误的物体的扫视次数相同。在不同任务条件下，扫视潜伏期相似，因此结果不能用速度-准确性权衡来解释。结果表明，特定的动作意图，如抓取，可以增强对与动作相关特征（如方向）的视觉处理。这些发现共同支持了这样一种观点，即视觉注意可以最好地理解为一种为动作服务的选择机制。
