Mapping the zone of eye-height utility for seated and standing observers
Mapping the zone of eye-height utility for seated and standing observers
复制标题
DOI：
10.1068/p2837
复制
发表时间：
2000-01-01
期刊：
影响因子：
1.7
通讯作者：
Proffitt, DR
中科院分区：
文献类型：
--
作者：
Wraga, M;Proffitt, DR
在一系列实验中，我们在空间的垂直轴内划定了一个区域，在该区域中，眼睛高度(EH)信息被最大限度地用于测量物体高度，被称为“眼高效用区域”(Wraga，1999b Journal of Experial心理学，Human Performance and Performance 25 518-530)。为了测试区域的下限，通过引入假透视(FP)梯度来改变地板上的线性透视)，而除线性透视外的所有EH信息源保持不变。对于坐着的观察者(实验1a)，FP梯度产生了对高达0.15 EH的矩形物体高度的高估。这个值被认为正好在该区域的下限之外。在虚拟环境中，坐着的(实验1b)和站立的(实验2)的观察者都重复了这一发现。对于区域的上限，通过降低观察者在虚拟场景中的投影中心来操纵EH信息本身。降低站立(实验3)和坐着(实验4)的有效EH，观察者对高达2.5 EH的物体产生了相应的高估。这个约为0.20-2.5EH的区域表明，人类视觉系统根据其有效性对大小信息进行不同的加权。
In a series of experiments, we delimited a region within the vertical axis of space in which eye height (EH) information is used maximally to scale object heights, referred to as the "zone of eye height utility" (Wraga, 1999b Journal of Experimental Psychology, Human Perception and Performance 25 518-530). To test the lower limit of the zone, linear perspective ton the floor) was varied via introduction of a false perspective (FP) gradient while all sources of EH information except linear perspective were held constant. For seated (experiment la) observers, the FP gradient produced overestimations of height for rectangular objects up to 0.15 EH tall. This value was taken to be just outside the lower limit of the zone. This finding was replicated in a virtual environment, for both seated (experiment Ib) and standing (experiment 2) observers. For the upper limit of the zone, EH information itself was manipulated by lowering observers' center of projection in a virtual scene. Lowering the effective EH of standing (experiment 3) and seated (experiment 4) observers produced corresponding overestimations of height for objects up to about 2.5 EH. This zone of approximately 0.20-2.5 EH suggests that the human visual system weights size information differentially, depending on its efficacy.