Can familiar words boost toddler language learning?

NCT ID NCT05921214

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Recruitment status, easiest to join first

Recruiting now This study
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
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 Results may not be published yet.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
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Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jul 13, 2026 · Last updated Jul 14, 2026 · Updated 1 time

Summary

This study compares word learning in late-talking toddlers (ages 2–3) who receive a behavioral treatment called VAULT. One group is taught words from categories they already know (like animals), while the other group learns words from less familiar categories. The goal is to see which approach helps children learn more words overall.

What this could mean

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

Active substance
VAULT (Vocabulary Acquisition and Usage for Late Talkers) – a behavioral vocabulary learning treatment
What this could lead to
If successful, this could help refine language therapy for toddlers with language delays, making it more effective by focusing on familiar word categories.
What could go wrong
This is a small, early-stage study with only 32 children, so results may not apply to all late-talking toddlers. The treatment is behavioral and requires consistent parent participation.

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

About 32 people

The number the study aims to enrol. It can still change while the study runs.

Started

Jun 2025

Expected to finish

Dec 2026

An estimate. End dates often move.

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

2 to 4 years

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

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: * Native English Speaking * Pass pure tone hearing screening or medical report of normal hearing * 2-3 Years of age * MCDI expressive scale \<10th percentile Exclusion Criteria: * Parental report of other diagnoses * Enrolled in concurrent treatment elsewhere * Nonverbal IQ \<75 as measured by the Bayley scales * Parents unable to consistently bring child to treatment sessions

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Conditions

The condition(s) this trial relates to.

Language Development Disorders language disorder

As listed by the trial registrant

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

How to take part

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  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

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  3. A doctor treating you

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Contacts and locations

Locations

  • University of Arizona

    RECRUITING

    Tucson, Arizona, 85721, United States

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