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首页> 外文会议>2017 IEEE World Haptics Conference >The longer the first stimulus is explored in softness discrimination the longer it can be compared to the second one
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The longer the first stimulus is explored in softness discrimination the longer it can be compared to the second one

机译：在柔软度判别中探索第一个刺激的时间越长，与第二个刺激相比的时间就越长

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In haptic perception information is often sampled serially over a certain interval of time. For example, a stimulus is repeatedly indented to repeatedly estimate its softness. Albeit such redundant estimates are equally reliable, they seem to contribute differently to the overall haptic percept in a comparison task. When comparing the softness of two silicon rubber stimuli, the within-stimulus weights of estimates of the second stimulus' softness decrease during the exploration. Here we test the hypothesis that such decrease of weights depends on the representation strength of the first stimulus' softness. We varied the length of the first stimulus' exploration. Participants subsequently explored two silicon rubber stimuli by indenting the first stimulus (comparison) 1 or 5 times and the second stimulus (standard) always 3 times. We assessed the weights of indentation-specific estimates from the second stimulus by manipulating perceived softness during single indentations. Our results show that the longer the first stimulus is explored the more estimates of the second stimulus' softness can be included in the comparison of the two stimuli. This suggests that the exploration length of the first stimulus determines the strength of its representation which influences the decrease of weights of indentation-specific estimates of the second stimulus.
机译：在触觉感知中，信息通常是在一定时间间隔内连续采样的。例如，重复缩进刺激以重复估计其柔软度。尽管这样的冗余估计同样可靠，但它们在比较任务中对总体触觉感知的贡献似乎有所不同。当比较两个硅橡胶刺激物的柔软度时，在勘探过程中，第二刺激物的柔软度估计值的刺激内权重减小。在这里，我们检验这样的假设：权重的这种减少取决于第一刺激的柔软度的表示强度。我们改变了第一次刺激的探索时间。参与者随后通过将第一个刺激（比较）缩进1或5次而将第二个刺激（标准）始终缩进3次来探索两个硅橡胶刺激。我们通过操纵单次压痕过程中感觉到的柔软度来评估第二种刺激对压痕特定估计值的权重。我们的结果表明，探索第一个刺激的时间越长，可以将两个刺激的比较中包含的第二个刺激的柔软度的估计就越多。这表明，第一刺激的探查长度决定了其表示的强度，这影响了第二刺激的压痕特定估计权重的降低。

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