Humans integrate visual and haptic information in a statistically optimal fashion
Humans integrate visual and haptic information in a statistically optimal fashion
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DOI：
10.1038/415429a
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发表时间：
2002-01-24
期刊：
影响因子：
64.8
通讯作者：
Banks, MS
中科院分区：
文献类型：
--
作者：
Ernst, MO;Banks, MS
当一个人在用手探索某个物体时，视觉和触觉都会提供用于估计该物体属性的信息。视觉经常主导综合视觉触觉感知，例如在判断大小、形状或位置时(1-3)，但在某些情况下，感知明显受到触觉影响(4-7)。在这里，我们提出了一个一般原则，该原则可以最大限度地减少最终估计的方差，决定视觉或触觉的主导程度。这一原理是通过使用最大似然估计（8-15）来组合输入来实现的。为了定量研究提示组合，我们首先测量了与高度的视觉和触觉估计相关的方差。然后，我们使用这些测量来构建最大似然积分器。该模型在视觉触觉任务中的表现与人类非常相似。因此，神经系统似乎以类似于最大似然积分器的方式组合视觉和触觉信息。当与视觉估计相关的方差低于与触觉估计相关的方差时，就会出现视觉优势。
When a person looks at an object while exploring it with their hand, vision and touch both provide information for estimating the properties of the object. Vision frequently dominates the integrated visual-haptic percept, for example when judging size, shape or position(1-3), but in some circumstances the percept is clearly affected by haptics(4-7). Here we propose that a general principle, which minimizes variance in the final estimate, determines the degree to which vision or haptics dominates. This principle is realized by using maximum-likelihood estimation(8-15) to combine the inputs. To investigate cue combination quantitatively, we first measured the variances associated with visual and haptic estimation of height. We then used these measurements to construct a maximum-likelihood integrator. This model behaved very similarly to humans in a visual-haptic task. Thus, the nervous system seems to combine visual and haptic information in a fashion that is similar to a maximum-likelihood integrator. Visual dominance occurs when the variance associated with visual estimation is lower than that associated with haptic estimation.