Determining Optimal Treatment Intensity for Children With Language Impairment
Public ClinicalTrials.gov record NCT04501536. 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.
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
The purpose of this study is to determine the amount of speech-language intervention children with language impairment need to make vocabulary gains. The investigators hope to identify the optimal amount of intervention needed as well as the point at which adding more intervention is no longer beneficial. Participants will be randomly assigned (like a flip of a coin) to attend therapy either one time a week for 10 weeks (2 hours a session) or 4 times a week for 10 weeks (30 min per session). Each therapy session will follow a word learning intervention that is designed to increase children's word learning abilities using rich, robust word learning strategies within story book readings. The optimal amount of intervention relates to duration, dose, and frequency. Duration refers to how long the child is seen for (e.g., 10 weeks, 1 year). Dose represents the number of exposures to each new vocabulary word within a therapy session. Frequency represents the number of therapy sessions per week. The investigators will test the hypothesis that distributed learning leads to higher gains. The investigators propose that the greatest gains will be observed for children who receive high-frequency/low-dose or low-frequency/high-dose treatments as compared to children who receive high-frequency/high-dose or low-frequency/low-dose treatments. The investigators will test the hypothesis that for both low-frequency and high-frequency treatments, there is a point at which increases in treatment dose do not correspond to any additional gains in children's vocabulary skills during treatment. At the close of this four-year study, evidence concerning optimal treatment intensity of a word learning intervention will be instrumental for immediately informing speech-language pathologists in how much vocabulary treatment to prescribe as well as for designing additional clinical trials by our and other research teams.
Study identification
- NCT ID
- NCT04501536
- Recruitment status
- Completed
- Study type
- Interventional
- Phase
- Not applicable
- Enrollment
- 59 participants
Conditions and interventions
Conditions
Eligibility (public fields only)
- Age range
- 5 Years to 8 Years
- Sex
- All
- Healthy volunteers
- Healthy volunteers not accepted
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Aug 9, 2020
- Primary completion
- Jan 8, 2025
- Completion
- Jul 30, 2025
- Last update posted
- Oct 27, 2025
2020 – 2025
United States locations
- U.S. sites
- 2
- U.S. states
- 2
- U.S. cities
- 2
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| The Ohio State University | Columbus | Ohio | 43210 | — |
| University of Texas at Austin | Austin | Texas | 78712 | — |
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 NCT04501536, 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 Oct 27, 2025 · Synced Sep 10, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT04501536 live on ClinicalTrials.gov.