Harvey M, Milner A D, Roberts R C
School of Psychology, University of St Andrews, Scotland.
Brain Cogn. 1995 Feb;27(1):59-78. doi: 10.1006/brcg.1995.1004.
The "Landmark Task" is designed to tease apart two major factors in determining line bisection errors in spatial neglect: one whose general nature is perceptual, the other whose nature is motor. On critical test trials, the subject is required to point to whichever end of a mid-transected line is judged as nearer to the transection. Seven out of eight neglect patients pointed consistently to the left end of such lines. Thus their misjudgments were made in the direction opposite to any putative "directional hypokinesia." One patient, however, pointed predominantly rightward on these test trials. Normal controls and unilateral stroke patients were also tested on the Landmark Task. Cueing of one end of a line led to a relative perceptual overestimation of that half of the line in all of these groups.
“标志性任务”旨在区分决定空间忽视中线二等分误差的两个主要因素：一个本质上是感知性的，另一个本质上是运动性的。在关键测试试验中，要求受试者指出被判断为更靠近横切线的横切中线的任意一端。八名忽视患者中有七名始终指向这些线的左端。因此，他们的错误判断方向与任何假定的“定向运动减退”相反。然而，有一名患者在这些测试试验中主要指向右侧。正常对照组和单侧中风患者也接受了标志性任务测试。在所有这些组中，提示线的一端会导致对该半条线的相对感知高估。
