Rapid Perceptual Learning: A Potential Source of Individual Differences in Speech Perception Under Adverse Conditions?
Tali Rotman, Limor Lavie, Karen Banai
PMID 32552477WHAT IT FOUND
Rapid learning of distorted speech predicts how well people understand other challenging speech, independent of hearing loss, vocabulary, and memory.
Older adults with hearing loss learn more slowly but still rely on this capacity, suggesting it is a key driver of listening difficulty.
Key findings
01Rapid perceptual learning of time-compressed speech significantly predicted recognition of natural-fast speech and speech-in-noise in both young and older adults, even after accounting for hearing, vocabulary, working memory, attention, and baseline recognition.
02Older adults with age-related hearing loss showed significant rapid learning, but their learning slopes were numerically smaller than those of young adults, indicating reduced capacity to adapt to distorted speech.
03Vocabulary was a consistent significant predictor of speech recognition across groups and conditions, whereas working memory only predicted speech-in-noise recognition in young adults.
STILL TO COME
How it was doneWhat they foundWhat it means for SLPs
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What it does not show
The study design is correlational, so it cannot prove that rapid learning causes better speech recognition. Test conditions differed between groups (e.g., older adults had slower compression rates and more trials), preventing direct statistical comparison of learning rates. Participants were tested in unaided conditions, which may not reflect real-world performance when using hearing aids. The association between learning and speech-in-noise recognition in young adults could partly reflect talker familiarity rather than general learning capacity.
Declared interests
Funded by the Israel Science Foundation and Mr. Omri Gavish. No other conflicts of interest declared.
The easy way to misread this
Do not interpret the significant association between rapid learning and speech recognition as proof that training learning skills will improve speech perception. This is a correlational study; it shows that people who learn faster also perceive better, but it does not demonstrate that improving learning rate causes better speech recognition.