Baumgartner Elisabeth, Wiebel Christiane B, Gegenfurtner Karl R
Multisens Res. 2013;26(5):429-55. doi: 10.1163/22134808-00002429.
Research on material perception has received an increasing amount of attention recently. Clearly, both the visual and the haptic sense play important roles in the perception of materials, yet it is still unclear how both senses compare in material perception tasks. Here, we set out to investigate the degree of correspondence between the visual and the haptic representations of different materials. We asked participants to both categorize and rate 84 different materials for several material properties. In the haptic case, participants were blindfolded and asked to assess the materials based on haptic exploration. In the visual condition, participants assessed the stimuli based on their visual impressions only. While categorization performance was less consistent in the haptic condition than in the visual one, ratings correlated highly between the visual and the haptic modality. PCA revealed that all material samples were similarly organized within the perceptual space in both modalities. Moreover, in both senses the first two principal components were dominated by hardness and roughness. These are two material features that are fundamental for the haptic sense. We conclude that although the haptic sense seems to be crucial for material perception, the information it can gather alone might not be quite fine-grained and rich enough for perfect material recognition.
最近，关于材料感知的研究受到了越来越多的关注。显然，视觉和触觉在材料感知中都起着重要作用，但在材料感知任务中这两种感觉如何比较仍不清楚。在此，我们着手研究不同材料的视觉和触觉表征之间的对应程度。我们要求参与者对84种不同材料的几种材料属性进行分类和评级。在触觉情况下，参与者被蒙上眼睛，要求通过触觉探索来评估材料。在视觉条件下，参与者仅根据视觉印象评估刺激。虽然触觉条件下的分类表现不如视觉条件下一致，但视觉和触觉模态之间的评级高度相关。主成分分析显示，在两种模态下，所有材料样本在感知空间中的组织方式相似。此外，在两种感觉中，前两个主成分都由硬度和粗糙度主导。这是触觉的两个基本材料特征。我们得出结论，虽然触觉似乎对材料感知至关重要，但仅靠它所能收集的信息可能不够精细和丰富，无法实现完美的材料识别。
