Can an app help people who stutter speak more fluently?
NCT ID NCT06011837
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study looks at whether changing the sound of your own voice (like adding echo or whisper) can help adults who stutter speak more smoothly. About 100 people will use a special app for one month. The goal is to see if this simple technique improves fluency over time.
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Study facts
What this study's own registry entry says, in plain language.
- Phase
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Not a phased trial
Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.
- Participants
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About 100 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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May 2023
- Expected to finish
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Jun 2026
An estimate. End dates often move.
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 to 100 years
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Identifies as a person who stutters * Is US citizen or green card holder currently residing in the US * Has one of the following Apple devices: * iPhone with iOS 12.0 or later * iPad with iPadOS 12.0 or later * iPod touch with iOS 12.0 or later * Mac with macOS 11.0 or later and an Apple M1 chip or later * Has a SEPARATE browser-supporting device with a microphone * Is able to conduct the study in English * Qualifies based on an initial screening evaluation (Greater than 2.5% Stuttering-Like Dysfluencies per syllable) Exclusion Criteria: \-
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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Massachusetts Institute of Technology
Cambridge, Massachusetts, 02139, United States
More trials for these conditions
Other studies related to the condition(s) this trial covers.
- Can a once-daily pill ease stuttering? a trial puts lumateperone to the test.
- Brain scans and speech tasks aim to unlock the secrets of stuttering
- Brain zaps show promise for stuttering relief
- Brain zaps for stuttering? tiny trial tests rTMS
- Brain scans reveal how stuttering works in new drug study
- Brain zaps may unlock fluency for people who stutter