Glennerster A, Rogers B J, Bradshaw M F
Department of Experimental Psychology, University of Oxford, U.K.
Vision Res. 1996 Nov;36(21):3441-56. doi: 10.1016/0042-6989(96)00090-9.
Under identical viewing conditions, observers made two types of judgement about the shape of stereoscopically defined surfaces: one required an estimate of viewing distance for correct performance (e.g. setting the depth of a hemi-cylinder to equal its half-height or a dihedral angle to 90 deg), the other did not (matching the depth of, for example, sinusoidal corrugations or hemi-cylinders presented at two distances). Depth constancy for the two types of task was about 75% and 100%, respectively. We argue that observers may use a simple "direct" strategy to perform the depth matching task rather than constructing and comparing a metric representation of each surface.
在相同的观察条件下，观察者对立体定义表面的形状做出了两种类型的判断：一种判断需要估计观察距离才能正确完成（例如，将半圆柱体的深度设置为等于其半高或将二面角设置为90度），另一种则不需要（例如，匹配在两个不同距离呈现的正弦波纹或半圆柱体的深度）。这两种类型任务的深度恒常性分别约为75%和100%。我们认为，观察者可能使用一种简单的“直接”策略来执行深度匹配任务，而不是构建和比较每个表面的度量表示。
