Olmedo E L, Kirk R E
Percept Mot Skills. 1977 Jun;44(3 Pt 1):715-23. doi: 10.2466/pms.1977.44.3.715.
The effects of non-task-related stimulation on the performance of a simple visual vigilance task were investigated. 40 subjects monitored a stimulated CRT display for two 90-min sessions. The independent variables were variable vs constant intensity lighting and variable vs constant intensity noise. Probability of detection was not significantly different for the noise conditions; however, probability of detection was significantly higher under variable than under constant intensity lighting.