An interventional study of VAULT Phase 5 in Language Development Disorders, sponsored by University of Arizona. Recruiting at 1 site in United States. Open to participants aged 2 Years to 4 Years. Per ClinicalTrials.gov, last updated 2026-07-13.
Sponsored by University of Arizona · Not applicable, Interventional, and Treatment
The goal of this clinical trial is to compare word learning outcomes in late talking toddlers who are taught different types of words. The main question it aims to answer is if teaching words that come from categories that children already know (e.g., animals) will aid overall word learning. Children will take part in the Vocabulary Acquisition and Usage for Late Talkers (VAULT) word learning treatment and be taught words from more familiar or less familiar categories to see which group learns more words overall.
Children will be assigned to either the familiar or less-familiar word group. All children will receive 8 weeks of Vocabulary Acquisition and Usage for Late Talkers (VAULT) word learning treatment (2x/wk for 30 minutes each session). The investigators will measure how well children learn the words they are taught as well as the words that are in the environment, but not explicitly taught (control words). This will help us know if their learning is due to treatment or maturation. The investigators will compare children to themselves (taught words v. control words) to ensure that the overall treatment is working. Then, the investigators will compare children in the familiar word group to children in the less-familiar word group to see which group learns more overall.
121 studies on the registry are indexed under Language Development Disorders; 49 are open to participants now.
This study's planned enrollment of 32 is below the median of 74 across 106 interventional studies indexed under Language Development Disorders.
Browse Language Development Disorders studies →University of Arizona is the lead sponsor of 476 studies on the registry; 88 are open to participants now.
Of its 51 completed or terminated interventional studies of FDA-regulated products, 30 (59%) have results posted.
Counted across the registry records on this site, refreshed daily.
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Exclusion Criteria:
In this condition, children will learn new words that come from semantic categories (e.g., animals, body parts) from which they currently understand at least several words.
Behavioral: VAULT Phase 5
In this condition, children will learn new words that come from semantic categories (e.g., animals, body parts) from which they currently understand few or no words.
Behavioral: VAULT Phase 5
This is an input-based vocabulary learning treatment based on principles of statistical learning.
Treatment Effect Size
The investigators will count the number of spontaneous and probed productions of target and control words and calculate a treatment effect size (d).
Time frame: Change from baseline through treatment, which will average an 8-week time frame.
Number/Rate of Words Learned
The investigators will measure the number of words learned and rate of words learned as reported by the parent on the MCDI starting prior to treatment, and measured during, immediately following, and 4-6 weeks after treatment.
Time frame: Change from Initial Evaluation through Follow-up, which will average a 6-month time frame.
Post Treatment Retention
The investigators will use probe data and parental report to determine how many words the child retained from treatment.
Time frame: Change from end of treatment to follow up, which will average 4-6 weeks.
Plan to share: No
No publications or documents are linked to this record.
Started Jun 2025 (actual). Primary completion is estimated for Dec 2026, 17 months after the start.
Of 72 non-industry interventional studies with no phase under Language Development Disorders, half reached primary completion within 30 months of starting (the median), counting those still running; a quarter within 19 and three quarters within 57. This study's planned 17 months is below that.
Counting every sponsor, half of 72 studies reached it within 30 months; a quarter within 19 and three quarters within 57.
How these figures are worked out, and which studies are left out of them.
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