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Brain scans and speech tasks aim to unlock the secrets of stuttering

NCT ID NCT04929184

Knowledge-focused Sponsor: University of Michigan Source: ClinicalTrials.gov ↗

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Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jul 16, 2026 · Last updated Jul 17, 2026 · Updated 1 time

Summary

This study explores how adults who stutter process and produce speech compared to those who do not. Participants complete computer-based listening and speaking tasks over one or two visits. The goal is to better understand the underlying differences in speech processing that may contribute to stuttering.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

What this could lead to
If successful, this research could reveal new insights into the brain mechanisms behind stuttering, potentially guiding future therapies.
What could go wrong
This is an observational study, not a treatment trial, so it will not directly improve stuttering. Results may not lead to immediate clinical applications.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

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

145 people

The number who actually took part.

Started

Apr 2022

Finished

Jun 2025

Lead sponsor

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

6 to 65 years

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show 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 (adults who do not stutter): * 18-65 years old * English as primary language * Normal speech, language, hearing, cognition Exclusion criteria: (adults who do not stutter) * Personal or family history of stuttering * Major medical or psychiatric illness Inclusion criteria: (adults who stutter) * Aged 18-65 years * English as primary language * Normal speech, language, hearing, cognition (other than stuttering) * Currently stutters Exclusion criteria: (adults who stutter) * Speech therapy within the past year * Major medical or psychiatric illness Inclusion criteria: (children who do not stutter) * Aged 6 to 17 years * English as primary language * Normal speech, language, hearing, cognition Exclusion criteria: (children who do not stutter) * Personal or family history of stuttering * Major medical or psychiatric illness * Language/motor delay Inclusion criteria: (children who stutter) * Aged 6 to 17 years * English as primary language * Normal speech, language, hearing, cognition (other than stuttering) * Currently stutters Exclusion criteria: (children who stutter) * Major medical or psychiatric illness * Language/motor delay

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Conditions

The condition(s) this trial relates to.

stutter disorder Stuttering

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Stuttering Stuttering, adult Stuttering, childhood

Contacts and locations

Locations

  • Michigan State University

    East Lansing, Michigan, 48824, United States

  • University of Michigan

    Ann Arbor, Michigan, 48109, United States

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