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Why do we see colour differently? new study investigates

NCT ID NCT07671144

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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Sep 16, 2026 · Updated 4 times

Summary

This observational study aims to understand why individuals perceive colours and visual rivalry differently. Researchers will test 128 adults using computer-based tasks to measure colour perception and binocular rivalry (when each eye sees a different image). They will also explore whether these differences relate to a person's chronotype (morning vs. evening preference), sex, sleep patterns, and fatigue. The study is not testing any treatment or intervention.

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.

Participants

About 128 people

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

Started

Jul 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.

Who is studied

Healthy adult volunteers will be recruited from the university community and/or the surrounding community. Participants will complete computer-based colour perception and binocular rivalry tasks, together with self-report measures of chronotype, sleep, fatigue, and demographic characteristics.

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: * Adults aged 18 years or older. * Normal or corrected-to-normal visual acuity. * Normal or corrected-to-normal binocular vision. * Normal colour vision, or no self-reported colour vision deficiency. * Able to understand the study instructions and provide informed consent. * Able to complete computer-based visual perception tasks and self-report questionnaires. Exclusion Criteria: * Self-reported colour vision deficiency. * Uncorrected visual impairment or eye conditions that may interfere with visual perception tasks. * Strabismus, amblyopia, or other binocular vision problems that may interfere with binocular rivalry testing. * History of neurological disorders, photosensitive epilepsy, or severe sensitivity to flickering visual stimuli. * Current condition or medication that, in the investigator's judgment, may substantially affect visual perception, attention, or task performance. * Inability to complete the task procedures or provide valid responses.

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Conditions

The condition(s) this trial relates to.

color vision disorder

As listed by the trial registrant

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

Binocular rivalry Color perception Colour perception

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    2 sites. 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

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • Child Development Centre

    RECRUITING

    Kowloon, Hung Hom, Hong Kong

  • The Hong Kong Polytechnic University, Department of Applied Social Sciences

    NOT_YET_RECRUITING

    Hung Hom, Kowloon, Hong Kong