A Phase 2 interventional study of VAULT Phase 4 in Language Development Disorders, sponsored by University of Arizona. Completed at 1 site in United States. Open to participants aged 2 Years to 4 Years. Per ClinicalTrials.gov, last updated 2025-06-27.
Sponsored by University of Arizona · Phase 2, Interventional, and Treatment
The goal of this clinical trial is to compare two treatment conditions for late talking toddlers. In 8 weeks of word learning treatment, toddlers will be taught words that sound more like the words they already know or sound less like the words they already know. The investigators see which group learns more, to understand if choosing words that let children use the knowledge they already have helps with learning.
Late talking toddlers will be assigned to be in the More Familiar Sounds condition or the Less Familiar Sounds condition. Both groups will receive 8 weeks of Vocabulary Acquisition and Usage for Late Talkers (VAULT) word learning treatment (2x/week for 30 minutes per session) using their words. The investigators will compare learning within children (taught words v. control words that are not explicitly taught) to make sure the learning that is happening is due to the treatment and not just maturation. The investigators will compare across groups to see if the group treated with More Familiar Sounding words learns more than the group treated with Less Familiar Sounding words.
114 studies on the registry are indexed under Language Development Disorders; 47 are open to participants now.
This study's enrollment of 22 is below the median of 71 across 100 interventional studies indexed under Language Development Disorders.
Browse Language Development Disorders studies →University of Arizona is the lead sponsor of 466 studies on the registry; 87 are open to participants now.
Of its 47 completed or terminated interventional studies of FDA-regulated products, 29 (62%) have results posted.
Counted across the registry records on this site, refreshed daily.
Exclusion Criteria:
Children in this condition will learn new words whose sounds are more like the sounds in the words the child already understands.
Behavioral: VAULT Phase 4
Children in this condition will learn new words whose sounds are less like the sounds in the words the child already understands.
Behavioral: VAULT Phase 4
Children will receive an input-based word learning treatment that is designed 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 the 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 the 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 of the 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
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This study is completed, as verified in Jun 2025. You cannot join it, but the record below documents what was studied.
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Language Development Disorders→
University of Arizona