Schouten G, Blommaert F J
Institute for Perception Research (IPO), Eindhoven, The Netherlands.
Percept Psychophys. 1995 Oct;57(7):1012-22. doi: 10.3758/bf03205460.
In this paper, experiments are described in which brightness constancy was studied in a Ganzfeld environment. Luminance variation by means of neutral density filters was applied to stimuli consisting of a Ganzfeld with superimposed disks. To this end, a special-purpose apparatus was constructed. Sequential dichoptical brightness matches with a reference stimulus were carried out for the disks as well as the homogeneous surround. The results of these measurements indicate that (1) besides a clear tendency toward brightness constancy, small but systematic effects of the average luminance level are present and (2) the brightness of the Ganzfeld is hardly affected by the presence of the disks. Finally, it is shown that the experimental results can be modeled adequately in terms of a concept that involves an accumulation of contrast information.
本文描述了在 ganzfeld 环境中研究亮度恒常性的实验。通过中性密度滤光片改变亮度，应用于由带有叠加圆盘的 ganzfeld 组成的刺激物。为此，构建了一种专用仪器。对圆盘以及均匀的周围环境与参考刺激进行了顺序双色亮度匹配。这些测量结果表明：(1) 除了明显的亮度恒常性趋势外，平均亮度水平存在小但系统的影响；(2) ganzfeld 的亮度几乎不受圆盘存在的影响。最后表明，实验结果可以用一个涉及对比度信息积累的概念进行充分建模。
