Altered Selective Attention or Increased Imagination: Effects of Eye Closure on Vocal Expression Perception

Area of Science:

• Cognitive Psychology
• Auditory Perception
• Cross-modal Interaction

Background:

• Eye closure (EC) is hypothesized to influence sensory processing.
• Its impact on vocal expression perception, specifically attention versus imagination, remains unclear.

Purpose of the Study:

• To investigate how eye closure (EC) affects vocal expression perception.
• To test whether EC enhances selective attention or activates compensatory imagination.
• To determine if EC improves processing of unmodified versus acoustically degraded auditory stimuli.

Main Methods:

• Forty participants completed sound verification, confidence, and expressiveness rating tasks.
• Conditions included eye closure (EC) and eyes-open (EO), with full and filtered auditory stimuli.
• Data were analyzed to compare performance across conditions and stimuli types.

Main Results:

• Eye closure (EC) significantly increased confidence and expressiveness ratings compared to eyes-open (EO).
• Full stimuli received higher ratings than filtered stimuli under EC.
• EC did not impact basic sound detection, suggesting effects are prominent in complex cognitive tasks.

Conclusions:

• Eye closure (EC) enhances vocal perception via selective attention, not imaginative compensation.
• Visual deprivation modulates attentional allocation in auditory processing.
• Findings highlight cross-modal interactions between vision and audition in speech comprehension.