Time-varied noise effects on color-word test performance

Area of Science:

• Cognitive Psychology
• Auditory Neuroscience

Background:

• Noise exposure is a common environmental stressor.
• Understanding noise effects on cognitive performance is crucial for occupational and daily life settings.

Purpose of the Study:

• To investigate the impact of continuous and time-varied broadband noise on cognitive task performance.
• To differentiate the effects of noise intensity and noise variability on reaction times.

Main Methods:

• 10 subjects were divided into three groups: continuous, periodic, or aperiodic noise exposure.
• Participants completed a Stroop-type color-word test and a word-reading task under low (65 dBA) and high (85 dBA) noise conditions.
• Median reaction times were analyzed for both tasks across different noise conditions.

Main Results:

• Word-reading task reaction times were not significantly affected by noise intensity or variability.
• Color-naming task reaction times were significantly slower under high noise (85 dBA) conditions.
• High aperiodic noise led to significantly slower reaction times compared to continuous and periodic noise.

Conclusions:

• Noise intensity, particularly at 85 dBA, negatively impacts selective attention tasks like color naming.
• The temporal pattern of noise (aperiodic vs. continuous/periodic) influences cognitive performance.
• Findings support arousal, filter, and information processing theories of attention under noise stress.