Distal attribution and distance perception in sensory substitution
Distal attribution and distance perception in sensory substitution
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DOI：
10.1068/p6366
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发表时间：
2010-01-01
期刊：
影响因子：
1.7
通讯作者：
Warren, William H.
中科院分区：
文献类型：
--
作者：
Siegle, Joshua H.;Warren, William H.
在感觉替代中，用户可以直接意识到远端对象，如在日常感知中，或者基于对近端刺激的意识做出明确的认知推断。轶事证据支持远端归因的经验，但到目前为止，很少有严格的实验测试的索赔。在这项研究中，被蒙上眼睛的参与者使用一个由手指安装的光电二极管组成的设备观察目标光，该设备驱动背部的触觉振动。在眼罩关闭和目标删除，参与者移动一个参考对象，以匹配目标的自我中心的距离。被指示参加远端目标的参与者在2小时的实践中显着改善，而那些指示参加近端变量没有改善。无符号错误增加与近端注意的评级，但降低与目标对象的坚固性，与远端归因。性能转移到非优势臂和旋转的身体方向，表明学习不依赖于目标距离和手臂配置之间的关节特定的感觉运动的关系。实验结果证实，远端归因可以发生在感觉替代，基于知觉策略，而不是一个明确的认知策略。此外，他们认为，远端归因的信息基础不是一个关节特定的感觉运动关系，而是一个更抽象的空间不变量。
In sensory substitution, the user may be directly aware of distal objects, as in everyday perception, or make explicit cognitive inferences based on an awareness of the proximal stimulation. Anecdotal evidence supports the experience of distal attribution, but so far there have been few rigorous experimental tests of the claim. In this study, blindfolded participants observed a target light using a device consisting of a finger-mounted photodiode that drives tactile vibration on the back. With the blindfold off and the target removed, participants moved a reference object to match the perceived egocentric distance of the target. Participants who were instructed to attend to the distal target improved significantly during 2 h of practice, whereas those instructed to attend to proximal variables showed no improvement. Unsigned error increased with ratings of proximal attention, but decreased with ratings of target object solidity, consistent with distal attribution. Performance transferred to the non-dominant arm and to a rotated body orientation, demonstrating that learning did not depend on a joint-specific sensorimotor relationship between target distance and arm configuration. The results experimentally confirm that distal attribution can occur in sensory substitution, based on a perceptual strategy rather than an explicit cognitive strategy. Moreover, they suggest that the informational basis for distal attribution is not a joint-specific sensorimotor relation, but a more abstract spatial invariant.