Effect of structuring the workspace on cognitive and sensorimotor distance estimation: No dissociation between perception and action
Effect of structuring the workspace on cognitive and sensorimotor distance estimation: No dissociation between perception and action
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DOI：
10.3758/bf03193675
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发表时间：
2006-02-01
期刊：
影响因子：
--
通讯作者：
Iwanow, O
中科院分区：
文献类型：
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作者：
Coello, Y;Iwanow, O
关于视错觉的研究支持视觉信息对知觉和行动的独立加工，这些研究表明，情境信息影响显性判断，但不影响到达尝试。然而，有人提出反对意见，认为这两种类型的表现不能直接比较，因为它们通常关注视觉输入的不同属性。本研究的目的是量化背景信息（以纹理背景的形式）对自我中心距离的认知和感觉运动加工的影响。我们发现，包括可达物体的主观区域（通过认知任务探测）减少了，而在纹理背景存在的情况下（通过感觉运动任务探测）到达运动的幅度增加了。定向电机的性能不受实验条件的影响，但运动参数有模仿轨迹变化的趋势。纹理背景在认知和感觉运动任务中的相似但相反的效果表明，在这两个任务中，当视觉目标呈现在稀疏的环境中时，它们被认为更近。背景影响的百分比证实了对相反效果的常见解释，背景影响在两个任务中高度相关。我们的结论是，感知和行动的视觉加工不能与环境影响分离，因为当任务需要处理相似的空间特征时，它并没有区别。
Independent processing of visual information for perception and action is supported by studies about visual illusions, which showed that context information influences overt judgment but not reaching attempts. The objection was raised, however, that these two types of performance are not directly comparable, since they generally focus on different properties of the visual input. The goal of the present study was to quantify the influence of context information (in the form of a textured background) on the cognitive and sensorimotor processing of egocentric distance. We found that the subjective area comprising reachable objects (probed with a cognitive task) decreased, whereas the amplitude of reaching movement (probed with a sensorimotor task) increased in the presence of the textured background with both binocular and monocular viewing. Directional motor performance was not affected by the experimental conditions, but there was a tendency for the kinematic parameters to mimic trajectory variations. The similar but opposite effects of the textured background in the cognitive and sensorimotor tasks suggested that in both tasks the visual targets were perceived as closer when they were presented in a sparse environment. A common explanation for the opposite effects was confirmed by the percentage of background influence, which was highly correlated in the two tasks. We conclude that visual processing for perception and action cannot be dissociated from context influence, since it does not differ when the tasks entail the processing of similar spatial characteristics.