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Bilingual toddler study seeks to unlock secrets of word learning

NCT ID NCT07600242

Knowledge-focused Sponsor: Boston University Charles River Campus Source: ClinicalTrials.gov ↗

What the study statuses mean

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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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study looks at how bilingual toddlers learn new words in two languages, and how the words parents use help. Researchers will compare typically developing children with those who are late talkers. Children will play, read, and do an eye-tracking task to see how they learn words like animals and clothing. The goal is to understand how vocabulary grows in bilingual kids.

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 80 people

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

Started

Dec 2025

Expected to finish

Jul 2029

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

24 to 30 months

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

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: * At least 10% exposure to both English and Spanish or at least 90% exposure to English and another language Exclusion Criteria: * Hearing impairment * Uncorrected visual impairment * Neurological impairment * Genetic syndromes * Neurodevelopmental disabilities (e.g. autism) * More than 10% exposure to a language other than English or Spanish

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As listed by the trial registrant

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

Bilingualism Late talkers Network science Vocabulary acquisition

How to take part

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  2. The official record

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    Open the record ↗

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Contacts and locations

Locations

  • Boston University

    RECRUITING

    Boston, Massachusetts, 02215, United States

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