Visual Perception, Binocular Rivalry, and Fatigue-Related Individual Differences in Colour and Il… (NCT07671144) | Clinical Trial Compass
Not Yet RecruitingNot Applicable
Visual Perception, Binocular Rivalry, and Fatigue-Related Individual Differences in Colour and Illumination Judgement
Hong Kong128 participantsStarted 2026-07
Plain-language summary
This observational study aims to characterise individual differences in colour perception and binocular rivalry. Participants will complete computer-based visual perception tasks, including a colour perception task and a binocular rivalry task. The study will first examine whether individuals show measurable differences in these perceptual responses. It will then explore whether these differences are associated with chronotype, sex, sleep-related measures, and subjective fatigue. The findings may help clarify how stable individual characteristics and daily physiological states relate to visual perception.
Who can participate
Age range
18 Years – 25 Years
Sex
ALL
See this in plain English?
AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
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.
Questions worth asking your doctor
Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.
1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?
Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.
Questions for the trial coordinator
The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.
What they're measuring
1
Mean colour-adjustment values on the colour perception task
Timeframe: Day 1 (single laboratory session)
2
Mean perceptual dominance duration during binocular rivalry