Time-compressed speech
Time-compressed speech has been studied in 2 papers since 2022: 2 observational studies in people. The newest paper, Sep 13, 2025: “Sentence recall and neurophysiological effects of the "2-Sentence Problem" under time compression in younger and older listeners”.
2 papers study it2 findingsUpdated
“increased sentence count and faster speech rate significantly reduced recall accuracy, with older adults being more negatively affected, particularly under time compression.”
None of its findings points the other way.
- 2 independent labs in 1 country
- Funders: National Institute on Aging and 2 more
- Humans2
What did studies of Time-compressed speech find?
2Studies of Time-compressed speech measured 2 outcomes; the most studied are sentence recall accuracy (1 study) and speech recognition (1).
Sentence recall accuracy
downin humans1
1 study
Sentence recall accuracy
downin humans1
Time-compressed speech decreases sentence recall accuracy in humans.
“increased sentence count and faster speech rate significantly reduced recall accuracy, with older adults being more negatively affected, particularly under time compression.”
Human trialdelayed sentence recall under time compressionn = 40
Hearing research
Speech recognition
downin humans1
1 study
Speech recognition
downin humans1
Time-compressed speech decreases speech recognition in humans.
“The reduction in speech recognition associated with faster rates of speech was greater for older adults than younger adults.”
Human trial
Frontiers in aging neuroscience