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Phone check: daily Screen-Time diaries may boost Self-Awareness

NCT ID NCT07511374

Knowledge-focused Sponsor: The Hong Kong Polytechnic University Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 tests whether a simple daily routine—uploading a screenshot of your screen time and answering a few reflection questions—can help young adults become more aware of their recreational device use and improve their stress and life satisfaction. Researchers will enroll 240 people aged 18–25 who spend at least 3 hours per day on recreational screen time. Half will do the daily reflection for several weeks, while the other half serves as a control group.

What this could mean

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

Active substance
Ecological momentary intervention combining behavioral self-monitoring and metacognitive reflection
What this could lead to
If successful, this could point toward simple daily habits that help people manage screen time and reduce stress.
What could go wrong
This is a small, early-stage trial with no health outcomes—only self-reported and device-tracked data. Results may not apply broadly.

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 240 people

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

Started

Mar 2026

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

18 to 25 years

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: Participants must meet all of the following criteria: 1. Age between 18 and 25 years old. 2. Own and regularly use a smartphone. 3. Report an average daily recreational screen time of at least 3 hours on weekdays or 4 hours on weekends, based on self-report (Zablotsky et al., 2025). 4. Be able to access their device's built-in screen time tracking function (or equivalent system-level usage report) and upload screenshots when required. 5. Be willing and able to complete daily surveys throughout the full study period. 6. Indicate motivation to reduce or regulate their recreational screen use. Exclusion Criteria: 1. Outside the age range of 18-25 years. 2. Do not own a smartphone or do not use it regularly. 3. Report average daily recreational screen time below 3 hours on weekdays and below 4 hours on weekends. 4. Are unable to access device-based screen time tracking functions or cannot provide valid screenshots when required. 5. Are unwilling or unable to complete daily surveys across the study period (e.g., anticipated non-compliance, scheduling constraints). 6. Do not express motivation to reduce or regulate their recreational screen use.

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Conditions

The condition(s) this trial relates to.

Self-Control

As listed by the trial registrant

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

Behavioral self-monitoring and metacognitive reflection

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

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

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Contacts and locations

Locations

  • The Hong Kong Polythechnic University

    RECRUITING

    Hong Kong, Select An Option…, Hong Kong