Our previous research has shown that the difficulty of a concurrent visual task affects reported discomfort glare. Difficulty in that study was manipulated by changing the size of a stimulus in an acuity task. The present study extends that finding by (1) varying whether the concurrent task is required, independently of stimulus factors, and (2) adding a new manipulation of difficulty that may be perceived by subjects as similar to the intrinsic effects of glare: variation of luminance for the stimulus involved in the concurrent task. These findings indicate that discomfort-glare evaluation is affected by the presence and nature of a concurrent visual task, and to a lesser extent by the luminance of an irrelevant stimulus. (Author/publisher)
Samenvatting