Investigating Speech Sequencing in Neurotypical Speakers and Persons With Disordered Speech
Public ClinicalTrials.gov record NCT05437159. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Official title
Sequencing and Initiation in Speech Production: Investigating Speech Sequencing in Neurotypical Speakers, Persons Who Stutter, and Persons With Primary Progressive Aphasia
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
Persistent developmental stuttering affects more than three million people in the United States, and it can have profound adverse effects on quality of life. Despite its prevalence and negative impact, stuttering has resisted explanation and effective treatment, due in large part to a poor understanding of the neural processing impairments underlying the disorder. The overall goal of this study is to improve understanding of the brain mechanisms involved in speech motor planning and how these are disrupted in neurogenic speech disorders, like stuttering. The investigators will do this through an integrated combination of experiments that involve speech production, functional MRI, and non-invasive brain stimulation. The study is designed to test hypotheses regarding the brain processes involved in learning and initiating new speech sound sequences and how those processes compare in persons with persistent developmental stuttering and those with typical speech development. These processes will be studied in both adults and children. Additionally, these processes will be investigated in patients with neurodegenerative speech disorders (primary progressive aphasia) to further inform the investigators understanding of the neural mechanisms that support speech motor sequence learning. Together these experiments will result in an improved account of the brain mechanisms underlying speech production in fluent speakers and individuals who stutter, thereby paving the way for the development of new therapies and technologies for addressing this disorder.
Study identification
- NCT ID
- NCT05437159
- Recruitment status
- Completed
- Study type
- Interventional
- Phase
- Not applicable
- Enrollment
- 278 participants
Conditions and interventions
Interventions
- Learning of non-native phoneme combinations: 6 training sessions Behavioral
- Learning of non-native phoneme combinations: 1 training session Behavioral
- Learning of novel multisyllabic nonwords Behavioral
- Anodal tDCS Other
- Sham tDCS Other
- Learning of non-native phoneme combinations: 8 training sessions Behavioral
Behavioral · Other
Eligibility (public fields only)
- Age range
- 6 Years and older
- Sex
- All
- Healthy volunteers
- Accepts healthy volunteers
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Apr 2, 2023
- Primary completion
- May 30, 2026
- Completion
- May 30, 2026
- Last update posted
- Jul 23, 2026
2023 – 2026
United States locations
- U.S. sites
- 3
- U.S. states
- 2
- U.S. cities
- 2
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| Massachusetts General Hospital | Boston | Massachusetts | 02129 | — |
| Boston University | Boston | Massachusetts | 02215 | — |
| University of Michigan | Ann Arbor | Michigan | 48109 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT05437159, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Jul 23, 2026 · Synced Sep 3, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT05437159 live on ClinicalTrials.gov.