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Stimulus range bias leads to different settings when using luminance adjustment to evaluate discomfort due to glare

机译：当使用亮度调节来评估由于眩光引起的不适时，刺激范围偏差导致不同的设置

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摘要

Luminance adjustment is widely used to evaluate discomfort due to glare. This paper reports an experiment conducted to investigate two factors of the luminance adjustment procedure, stimulus range bias and direct vs indirect control. Stimulus range bias describes the influence on subjective evaluations of the range of stimuli available to the test observer, with range being the minimum and maximum available glare source luminance in the current context. For the glare source, an artificial window, there were three ranges, having maximum luminances of 5 106, 7288 and 9469 cd/m(2). The results suggest that luminance range had a significant effect on settings made, sufficient to change settings by an amount equivalent to one step of a Hopkinson-like discomfort sensation scale. The mean luminance associated with just intolerable discomfort with the low range was less than that associated with just uncomfortable with the high range. Past experiments have used direct control, where the observer makes the adjustment directly, and indirect control, where the observer instructs the experimenter to make the adjustment actions. Both methods were used in the current experiment. It was found that range bias was larger when using direct control than with indirect control. These findings contribute to an understanding of why different studies of discomfort glare have reported different results and hence proposed different discomfort models.
机译：亮度调节被广泛用于评估由于眩光引起的不适。本文报道了一项旨在研究亮度调节程序的两个因素的实验，即刺激范围偏差和直接与间接控制。刺激范围偏差描述了对测试观察者可用刺激范围的主观评估的影响，范围是当前上下文中最小和最大可用眩光源亮度。对于眩光源（人造窗），存在三个范围，最大亮度为5 106、7288和9469 cd / m（2）。结果表明，亮度范围对设置的影响很大，足以改变设置的量相当于霍普金森样不适感量表的一个步骤。在低范围内与仅不能忍受的不适相关的平均亮度小于在高范围内与仅感到不适的相关的平均亮度。过去的实验使用直接控制（由观察者直接进行调整）和间接控制（由观察者指示实验者进行调整动作）。两种方法均用于当前实验中。发现使用直接控制时的范围偏差要大于间接控制时的范围偏差。这些发现有助于理解为什么不同的不适眩光研究报告了不同的结果，因此提出了不同的不适模型。

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