Sittig A C, De Graaf J B
Department of Industrial Design Engineering, Delft University of Technology, The Netherlands.
Vision Res. 1994 Sep;34(17):2195-203. doi: 10.1016/0042-6989(94)90102-3.
Subjects performed a three-dot alignment in the frontoparallel plane. We found systematic deviations in alignment, especially for diagonally oriented stimuli. The biases did not depend on the angular size of the stimuli which was varied between 0.8 and 20 deg. We put forward a tentative explanation based on saccade trajectories. Extending the task to judgements of the straightness of virtual lines consisting of a varying number of dots showed that the biases decrease gradually when the number of dots increases. This suggests that there are two different and competing mechanisms to judge the straightness of virtual lines.
受试者在额状平行平面内进行三点对齐任务。我们发现对齐过程中存在系统性偏差，尤其是对于倾斜方向的刺激。这些偏差并不取决于在0.8度至20度之间变化的刺激的角大小。我们基于扫视轨迹提出了一个初步解释。将任务扩展到对由不同数量的点组成的虚拟线的直线度判断，结果表明当点的数量增加时，偏差会逐渐减小。这表明存在两种不同且相互竞争的机制来判断虚拟线的直线度。
