Brenner E, van Damme W J, Smeets J B
Erasmus Universiteit, Rotterdam, The Netherlands.
Percept Psychophys. 1997 Oct;59(7):1153-9. doi: 10.3758/bf03205528.
Visual judgements of distance are often inaccurate. Nevertheless, information on distance must be procured if retinal image size is to be used to judge an object's dimensions. In the present study, we examined whether kinesthetic information about an object's distance--based on the posture of the arm and hand when holding it--influences the object's perceived size. Subjects were presented with a computer simulation of a cube. This cube's position was coupled to that of a rod in the subject's hand. Its size was varied between presentations. Subjects had to judge whether the cube they saw was larger than, smaller than, or the same size as a reference. On some presentations, a small difference was introduced between the positions of the rod and of the simulated cube. When the simulated cube was slightly closer than the rod, subjects judged the cube to be larger. When it was farther away, they judged it to be smaller. We show that these changes in perceived size are due to alterations in the cube's distance from the subject rather than to kinesthetic information.
对距离的视觉判断往往不准确。然而，如果要利用视网膜图像大小来判断物体的尺寸，就必须获取有关距离的信息。在本研究中，我们考察了基于握持物体时手臂和手部姿势的关于物体距离的动觉信息是否会影响物体的感知大小。向受试者展示一个立方体的计算机模拟图像。这个立方体的位置与受试者手中一根杆的位置相关联。在不同的展示中，其大小会有所变化。受试者必须判断他们看到的立方体比一个参照物大、小还是一样大。在一些展示中，杆和模拟立方体的位置之间引入了一个小差异。当模拟立方体比杆稍近时，受试者判断立方体更大。当它更远时，他们判断它更小。我们表明，感知大小的这些变化是由于立方体与受试者之间距离的改变，而不是由于动觉信息。
