Purdy Kimberly A, Lederman Susan J, Klatzky Roberta L
Department of Psychology, University of South Carolina Spartanburg, 29303, USA.
Can J Exp Psychol. 2004 Mar;58(1):32-45. doi: 10.1037/h0087438.
The relationship between knowing where a haptic property is located and knowing what it is was investigated using a haptic-search paradigm. Across trials, from one to six stimuli were presented simultaneously to varying combinations of the middle three fingertips of both hands. Participants reported the presence/absence of a target or its location for four perceptual dimensions: rough/smooth, edge/no edge, relative position (right/left), and relative orientation (right/left). Reaction time data were plotted as a function of set size. The slope data indicated no difference in processing load for location as compared to identity processing. However, the intercept data did reveal a cost associated with processing location information. Location information was not obtained for "free" when identity was processed. The data also supported a critical distinction between material and edge dimensions versus geometric dimensions, as the size of the cost associated with processing location was larger for spatial than for intensive stimuli.
使用触觉搜索范式研究了知道触觉属性的位置与知道它是什么之间的关系。在一系列试验中，同时向双手中间的三个指尖的不同组合呈现一到六个刺激。参与者报告了目标在四个感知维度上的有无或其位置：粗糙/光滑、边缘/无边缘、相对位置（右/左）和相对方向（右/左）。反应时间数据作为集合大小的函数绘制。斜率数据表明，与识别处理相比，位置处理负载没有差异。然而，截距数据确实揭示了与处理位置信息相关的成本。在处理识别时，无法“免费”获得位置信息。数据还支持了材料和边缘维度与几何维度之间的关键区别，因为处理位置相关成本的大小对于空间刺激比强度刺激更大。
