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Nap time secrets: study tracks toddler brain development

NCT ID NCT06351098

Knowledge-focused Sponsor: University of Maryland, College Park 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 Results may not be published yet.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
The full record has not been published yet, so there is little to show here.
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This status has not been confirmed recently, so it may be out of date.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 follows 180 children aged 3 to 5 years who still nap regularly. Researchers will test their memory before and after naps, track brain changes with MRI, and monitor overnight sleep every 6 months for 18 months. The goal is to understand how napping helps memory and brain development, and what happens when children naturally stop napping.

What this could mean

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

What this could lead to
If successful, this could help parents and doctors understand when children can safely stop napping without harming memory or brain development.
What could go wrong
This is an observational study, not a treatment trial. It will not test any drug or therapy, and results may not apply to all children.

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 180 people

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

Started

Nov 2023

Expected to finish

Jun 2028

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

36 to 60 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: 1. 36-60 months at the time of enrollment 2. must be a habitual napper (defined as napping 5 or more days/week on average for the past month) 3. must sleep independently (not bedsharing; in order to maintain consistent sleep not interrupted by others) Exclusion Criteria: 1. diagnosis of any sleep disorder (other than mild parasomnia which is routine at this age) past or present (Child's Sleep Habit Questionnaire) 2. current use of psychotropic or sleep-altering medications (Developmental, Health, and Environment Questionnaire) 3. traveling beyond 1 time zone within 1 month prior to testing (phone screening) 4. fever or symptoms of respiratory illness at the time of testing (phone screening) 5. physical handicap which interferes with assessments (vision, hearing impairment; phone screening) 6. diagnosed developmental disability (Developmental, Health, and Environment Questionnaire) 7. history of neurological injury such as history of seizures, brain tumor, or stroke (phone screening) 8. presence of metal in the body (e.g., implant of any form) or other contraindication for MRI (e.g., claustrophobia, which is rare at this age). 9. external influences on nap habits (e.g., inability to nap due to school or caregiver schedule or interfering activities during a typical naptime) including if the child will enroll in full-day kindergarten by the end of the study. Caregivers will also be queried for the presence of interfering activities throughout enrollment (e.g., ecological momentary assessment (or EMA), sleep diaries at each wave).

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As listed by the trial registrant

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MEMORY

How to take part

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  1. The study's own enquiry address

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  2. The places running it

    2 sites. The list below names each one and where it is.

  3. The official record

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    Open the record ↗

  4. A doctor treating you

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Contacts and locations

Locations

  • University of Maryland

    RECRUITING

    College Park, Maryland, 20742, United States

    Contact Email: •••••@•••••

  • University of Massachusetts

    RECRUITING

    Amherst, Massachusetts, 01003, United States

    Contact Email: •••••@•••••

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