Individual differences in selective attention predict speech identification at a cocktail party

Area of Science:

• Auditory Neuroscience
• Cognitive Psychology
• Speech Perception

Background:

• Listeners with normal hearing exhibit significant variability in understanding speech amidst competing sounds, like in noisy environments.
• The precise factors contributing to this variance in speech comprehension remain incompletely understood.

Purpose of the Study:

• To investigate the role of selective attention in individual differences in speech understanding among normal-hearing listeners in the presence of competing speech.
• To determine if auditory and visual selective attention abilities correlate with sentence identification in complex acoustic scenes.

Main Methods:

• Fifty young, normal-hearing participants completed tasks assessing auditory and visual selective attention.
• Speech understanding was measured using sentence identification in the presence of spatially separated competing speakers.
• Correlational analyses examined the relationship between selective attention measures and speech intelligibility.

Main Results:

• Performance on selective attention tasks (both auditory and visual) was significantly associated with sentence identification accuracy in competing speech.
• Selective attention measures accounted for a similar amount of variance in speech understanding as binaural sensitivity to acoustic temporal fine structure.
• Working memory span, age, and audiometric thresholds did not show significant associations with speech understanding in noise.

Conclusions:

• Individual differences in the ability to focus selective attention are a significant factor in speech understanding difficulties experienced by some normal-hearing individuals in noisy environments.
• Reduced attentional focus, rather than diminished hearing sensitivity, may explain why some individuals struggle to communicate in situations with background noise.