Harvey Monika, Olk Bettina, Newport Roger, Jackson Stephen R
Department of Psychology, University of Glasgow, Glasgow, Scotland, UK.
Neuroreport. 2007 Mar 26;18(5):457-60. doi: 10.1097/WNR.0b013e328013cef0.
Patients with hemispatial neglect show deficits in size perception. We investigated how this effect would be modulated by a change in object orientation. Seven right-hemisphere-lesioned patients, with and without neglect, and a control group, were asked to indicate which one of two bilaterally presented lines was longer, shorter or the same. Depending on the participant's response, the length was increased or decreased in a staircase-like procedure. Line orientation was varied over separate blocks. All neglect patients judged a line on the left as shorter, predominantly for horizontal lines and lines rotated by 30 degrees. Moreover, the magnitude of the distortion effect varied considerably between patients from as little as 2% objective underestimation to as much as 20%.
患有半侧空间忽视的患者在大小感知方面存在缺陷。我们研究了物体方向的变化如何调节这种效应。七名右侧半球受损的患者，有忽视症状和无忽视症状的，以及一个对照组，被要求指出双边呈现的两条线中哪一条更长、更短或一样长。根据参与者的回答，长度以类似阶梯的程序增加或减少。线的方向在不同的组块中变化。所有忽视患者都判断左边的线更短，主要是对于水平线和旋转30度的线。此外，患者之间的扭曲效应大小差异很大，从低至2%的客观低估到高达20%。
