Rapid Perceptual Learning: A Potential Source of Individual Differences in Speech Perception Under Adverse...

Area of Science:

• Auditory perception and speech processing
• Cognitive neuroscience of aging
• Human auditory learning

Background:

• Individual differences in speech perception are significant in challenging listening conditions like rapid or noisy speech.
• Rapid auditory perceptual learning is hypothesized to be a key factor underlying these individual differences.

Purpose of the Study:

• To investigate the role of rapid perceptual learning in speech recognition.
• To assess the contribution of rapid learning, hearing status, and cognitive factors to speech recognition in young and older adults.

Main Methods:

• Assessed rapid perceptual learning of time-compressed speech in young adults (normal hearing) and older adults (age-related hearing loss).
• Evaluated the predictive power of learning, hearing thresholds, vocabulary, working memory, and selective attention on natural-fast speech (NFS) and speech-in-noise recognition.

Main Results:

• In young adults, rapid learning and vocabulary significantly predicted NFS and speech-in-noise recognition.
• In older adults, hearing thresholds, vocabulary, and rapid learning were significant predictors of NFS recognition.
• Models incorporating rapid learning provided a better fit for speech recognition data in both age groups.

Conclusions:

• Rapid auditory perceptual learning is a crucial skill that supports speech recognition, particularly under adverse listening conditions.
• This learning capacity, along with cognitive and audiological factors, contributes to successful speech perception across the adult lifespan.