Thompson J G, Fowler K A
J Gen Psychol. 1980 Oct;103(2d Half):227-32. doi: 10.1080/00221309.1980.9921003.
An experiment was performed to examine the effects of line orientation and retinal locus on the perceived length of a single line. Thirty-five male and female undergraduate volunteers each monocularly judged the length of five test lines presented in two orientations (horizontal and vertical) at five different retinal loci. Displacement of horizontal lines from the fovea on either the horizontal or vertical meridian produced decreases in perceived size. The perceived length of vertical lines, however, decreased only with displacements on the vertical meridian.
进行了一项实验，以研究线条方向和视网膜位置对单条线感知长度的影响。35名男女本科志愿者分别单眼判断了在五个不同视网膜位置以两种方向（水平和垂直）呈现的五条测试线的长度。水平子午线或垂直子午线上水平线条从中央凹的位移会导致感知大小减小。然而，垂直线条的感知长度仅在垂直子午线上有位移时才会减小。
