Numerosity judgments for tactile stimuli distributed over the body surface
Numerosity judgments for tactile stimuli distributed over the body surface
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DOI：
10.1068/p5380
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发表时间：
2006-01-01
期刊：
影响因子：
1.7
通讯作者：
Spence, C
中科院分区：
文献类型：
--
作者：
Gallace, A;Tan, HZ;Spence, C
大量的研究现在支持这样的说法，即两个不同的和可分离的过程涉及对视觉刺激进行数字判断：对多达4个刺激进行subitising（快速且几乎无错误），以及当超过4个刺激时进行计数（缓慢且容易出错）。我们研究了1-7振动触觉刺激的组合，同时在身体表面的触觉数字判断。在实验1中，刺激被呈现一次，而在实验2中的条件下的单一呈现和重复呈现的刺激进行了比较。两个实验都没有提供任何证据表明，无论是RT或错误的数据表明，subitisation絮凝物不会发生触觉刺激的斜率不连续。在实验3中，通过系统地改变振动触觉刺激的强度，我们能够证明，参与者不是简单地使用整个触觉显示器的“全局强度”来进行触觉数字判断，而是使用关于触觉激活的数量的信息。这里报告的三个实验的结果进行了讨论，目前的理论计数和subitising，触觉用户界面的设计和潜在的影响突出。
A large body of research now supports the claim that two different and dissociable processes are involved in making numerosity judgments regarding visual stimuli: subitising (fast and nearly errorless) for up to 4 stimuli, and counting (slow and error-prone) when more than 4 stimuli are presented. We studied tactile numerosity judgments for combinations of 1-7 vibrotactile stimuli presented simultaneously over the body surface. In experiment 1, the stimuli were presented once, while in experiment 2 conditions of single presentation and repeated presentation of the stimulus were compared. Neither experiment provided any evidence for a discontinuity in the slope of either the RT or error data suggesting that subitisation floes not occur for tactile stimuli. By systematically varying the intensity of the vibrotactile stimuli in experiment 3, we were able to demonstrate that participants were not simply using the 'global intensity' of the whole tactile display to make their tactile numerosity judgments, but were, instead, using information concerning the number of tactors activated. The results of the three experiments reported here are discussed in relation to current theories of counting and subitising, and potential implications for the design of tactile user interfaces are highlighted.