Color and brightness at work: Shedding some light on mind wandering

Area of Science:

• Environmental Psychology
• Cognitive Neuroscience
• Human Factors Engineering

Background:

• Occupational hazards can stem from environmental factors like ambient color and brightness.
• Cognitive performance, particularly sustained attention, is crucial in modern workplaces.
• Mind wandering (MW) is a significant disruptor of sustained attention.

Purpose of the Study:

• To investigate the impact of ambient color (white vs. blue) and brightness (300 vs. 800 lx) on sustained attention.
• To examine the effects of these environmental conditions on brain electrophysiology related to MW.
• To identify optimal lighting conditions for maintaining cognitive functions.

Main Methods:

• 20 participants completed a continuous performance test (CPT) in a virtual reality environment.
• Exposure to four distinct conditions: white/blue light at 300/800 lx.
• Analysis of sustained attention and brain electrophysiology (MW network).

Main Results:

• High-brightness blue light significantly improved sustained attention.
• Blue light at high brightness decreased delta frequency band activity in the MW network.
• Blue light at low brightness decreased beta frequency band activity; white light increased MW network activity.

Conclusions:

• High-brightness blue light exposure enhances sustained attention and reduces activity in MW-related neural regions.
• Results suggest blue light may be beneficial for environments requiring sustained cognitive function.
• Recommendations for interior design in educational settings and vehicles to optimize cognitive performance.