Maravita Angelo, Spence Charles, Kennett Steffan, Driver Jon
Institute of Cognitive Neuroscience, University College, London, UK.
Cognition. 2002 Mar;83(2):B25-34. doi: 10.1016/s0010-0277(02)00003-3.
In a visual-tactile interference paradigm, subjects judged whether tactile vibrations arose on a finger or thumb (upper vs. lower locations), while ignoring distant visual distractor lights that also appeared in upper or lower locations. Incongruent visual distractors (e.g. a lower light combined with upper touch) disrupt such tactile judgements, particularly when appearing near the tactile stimulus (e.g. on the same side of space as the stimulated hand). Here we show that actively wielding tools can change this pattern of crossmodal interference. When such tools were held in crossed positions (connecting the left hand to the right visual field, and vice-versa), the spatial constraints on crossmodal interference reversed, so that visual distractors in the other visual field now disrupted tactile judgements most for a particular hand. This phenomenon depended on active tool-use, developing with increased experience in using the tool. We relate these results to recent physiological and neuropsychological findings.
在视觉-触觉干扰范式中，受试者判断触觉振动是出现在手指还是拇指上（上部与下部位置），同时忽略也出现在上部或下部位置的远处视觉干扰光。不一致的视觉干扰物（例如下部的光与上部的触觉相结合）会干扰这种触觉判断，尤其是当它出现在触觉刺激附近时（例如在受刺激手的同一侧空间）。在这里，我们表明积极使用工具可以改变这种跨模态干扰模式。当这些工具以交叉位置握持时（将左手连接到右视野，反之亦然），跨模态干扰的空间限制会反转，因此另一个视野中的视觉干扰物现在对特定的手最能干扰触觉判断。这种现象取决于工具的主动使用，并随着使用工具经验的增加而发展。我们将这些结果与最近的生理和神经心理学发现联系起来。
