Evidence for the duplex theory of tactile texture perception
Evidence for the duplex theory of tactile texture perception
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DOI：
10.3758/bf03206916
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发表时间：
2000-05-01
期刊：
影响因子：
--
通讯作者：
Risner, SR
中科院分区：
文献类型：
--
作者：
Hollins, M;Risner, SR
三个实验报告轴承Katz的假设，触觉纹理感知介导的振动线索的情况下，细纹理和粗纹理的情况下，由空间线索。心理物理反应时，磨料表面移动在皮肤上进行了比较，在静态触摸，这并不提供振动线索。实验我用两个间隔强迫选择程序来衡量歧视的表面。精细的表面，很容易区分时，在皮肤上移动变得无法区分的运动，粗糙的表面，然而，同样可辨别的移动和静止的条件。这被证明不是由于任何固有的更大的困难，精细纹理的歧视。实验2和3使用自由的幅度估计，以获得更全面的图片纹理（粗糙度）感知运动的影响。没有运动，知觉严重退化（心理物理幅度函数被压扁）的纹理与元素大小低于100 μ m，然而，在这一点上，消除运动产生的整体粗糙度下降，但不是在幅度函数的斜率。因此，两个组成部分的刺激（大概是振动和空间）有助于纹理感知，卡茨认为，机制响应后者似乎是从事在纹理元素的大小下降到100 μ m，一个令人惊讶的小值。
Three experiments are reported bearing on Katz's hypothesis that tactile texture perception is mediated by vibrational cues in the case of fine textures and by spatial cues in the case of coarse textures. Psychophysical responses when abrasive surfaces moved across the skin were compared with those obtained during static touch, which does not provide vibrational cues. Experiment I used two-interval forced-choice procedures to measure discrimination of surfaces. Fine surfaces that were readily discriminated when moved across the skin became indistinguishable in the absence of movement; coarse surfaces, however, were equally discriminable in moving and stationary conditions. This was shown not to result from any inherently greater difficulty of fine-texture discrimination. Experiments 2 and 3 used free magnitude estimation to obtain a more comprehensive picture of the effect of movement on texture (roughness) perception. Without movement, perception was seriously degraded (the psychophysical magnitude function was flattened) for textures with element sizes below 100 mu m; above this point, however, the elimination of movement produced an overall decrease in roughness, but not in the slope of the magnitude function. Thus, two components of stimulation (presumably vibrational and spatial) contribute to texture perception, as Katz maintained; mechanisms for responding to the latter appear to be engaged at texture element sizes down to 100 mu m, a surprisingly small value.