ONTOGONY ON MECHANISMS OF INFORMATION PROCESSING CONCERNING HEAVINESS PERCEPTION

在所有视觉输入完全被阻断的情况下，这项研究中的受试者只使用指尖来调查人类对触觉大小的知觉与重感的关系。测试对象包括三组-铜(CP)、铝(AL)和塑料(PL)-10个立方体，重量分别为0.05、0.10、0.15、0.20、0.25、0.29、0.39、0.49、0.74和0.98N。所有的立方体都被光滑的乙烯基材料完全覆盖，以消除任何关于单个立方体的实际组成的无关输入。精心布置的屏幕完全包围了工作空间，以消除任何可能的视觉提示。每次比较都是在同一材料的一对立方体之间进行-CP与CP，AL与AL，以及PL与PL-以消除密度的影响。15名受试者(&lt；M&>；__-=19.2，&lt；SD&gt；_-=0.68岁)试图判断每个实验中第一个和第二个立方体之间的重量差异，这些立方体是由实验者交给他们的，并且是g…拇指和食指之间的声音更刺耳。共有340个试验，70个权重组合，包括160个上升试验(较重的)、160个下降试验(较轻的)和20个相同的重量试验，针对每种材料的每个受试者被伪随机呈现。所有材料的重量差异和试验次数的组合是相同的，因此触觉大小被认为是单一的独立因素。受试者对放置同一组合的一对立方体导致的相同重量差异的反应的准确性在三种材料中进行了比较。观察到，像CP这样的具有较小尺寸效应的材料比具有更显著尺寸效应的PL更有利于更准确地区分相同的重量差异。这表明，当比较密度相等的物体时，指尖感知的大小的微小变化对重量感知有直接影响；尽管在为本研究建立的条件下不存在这种影响，但这一发现可以被认为类似于比较密度不等的物体时的大小-重量错觉(Charpentier 1891)。这项研究的结果还表明，触觉大小不断地参与人类对重量的感知，同时存在一种整合了重量和触觉大小因素的加工机制，在这种机制中，重量随着体重的增加或减少而增加，反之亦然

With all visual input totally blocked, subjects in this study utilized fingertips only to investigate the involvement of Haptically Perceived Size in Heaviness Perception among humans. The objects used for testing consisted of three sets - copper (CP), aluminum (AL), and plastic (PL) - of ten cubes weighing 0.05, 0.10, 0.15, 0.20, 0.25, 0.29, 0.39, 0.49, 0.74, and 0.98 N respectively. All of the cubes were completely covered with a smooth vinyl material to eliminate any extraneous input concerning the actual composition of the individual cubes. Strategically placed screens totally enclosed the working space to eliminate any possible visual cues. Each comparison was between a pair of cubes of the same material - CP vs. CP, AL vs. AL, and PL vs. PL - to eliminate the effect of Density. Fifteen subjects (<M>__- = 19.2, <SD>___- = 0.68 yr.) attempted to judge differences in heaviness between the first and second cube in each trial that had been handed to them by the experimenter and were g … More rasped between the thumb and the index finger. A total of 340 trials with 70 combinations of Weight composed of 160 Ascending Trials (heavier), 160 Descending Trials (lighter), and 20 Identical Weight Trials were pseudo-randomly presented to each subject for each material. Combinations of difference in Weight and the number of trials were identical for all materials so that Haptic Size was regarded as the single independent factor. Accuracy of the subjects' responses for Identical Weight Differences that resulted from placing a pair of cubes of the same combination was compared among the three materials. It was observed that a material like CP that had a lesser Size Effect facilitated significantly more accurate discrimination of the Identical Weight Differences than PL with its more significant Size Effect. This suggests that small changes in Haptically Perceived Size by the fingertips have a direct influence on Heaviness Perception when comparing objects of equal Density ; although it did not exist in the conditions established for this study, this finding can be considered analogous to the Size-Weight Illusion when comparing objects of unequal Density (Charpentier 1891). The findings of this study also suggest the constant involvement of Haptic Size in Heaviness Perception by humans along with the existence of a processing mechanism that integrates the factors of Weight and Haptic Size in which heaviness increases either as Weight increases or as Size decreases, and vice versa Less