Color perception and binocular rivalry: how individual differences relate to daily states
Official title: Characterising Individual Differences in Colour Perception and Binocular Rivalry and Their Associations With Chronotype, Sex, and Sleep
Run by The Hong Kong Polytechnic University · NCT07671144 · Data updated 2026-11-12
This observational study tests how people’s color perception and binocular rivalry vary and whether those differences relate to chronotype, sleep, fatigue, and sex.
Quick facts
| Study type | Observational |
|---|---|
| Ages | 18 Years to 25 Years |
| Sex | All |
| Enrollment | 128 (estimated) |
| Sponsor | The Hong Kong Polytechnic University Academic / other |
| Locations | 2 sites (Kowloon, Hung Hom and 1 other locations) |
| Status | Recruiting |
| Started | July 1, 2026 |
| Main results expected | December 30, 2026 |
| Study ends | December 30, 2026 |
| Registry record updated | September 15, 2026 |
| Trial ID | NCT07671144 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Adults aged 18 or older with normal or corrected vision and color vision, able to complete computer tasks and questionnaires.
✕Probably not a fit
Individuals with uncorrected vision impairments, known color vision deficiency, or binocular vision problems that affect testing may not benefit.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This is an observational study that uses computer-based visual perception tasks to measure individual differences in color perception and binocular rivalry. Participants will also complete questionnaires on chronotype, sleep, fatigue, and demographic factors. The researchers will first assess whether measurable differences exist across individuals, then explore associations with daily physiological states and personal characteristics. No medical intervention or device is involved, and the study focuses on understanding stable and state-related variations in perception. Findings may clarify how personal traits and daily states relate to visual processing.
Why it matters
Potential benefit: Understanding how individual characteristics and daily states influence color and depth of perception could inform personalized approaches to vision-related tasks and accommodations.
How similar studies have gone: Previous work has shown stable individual differences in perceptual tasks and links to sleep and chronotype, supporting this observational approach.
Who can join: the full rules
Show full inclusion / exclusion criteria
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.
Where it's running
-
Child Development Centre
Kowloon, Hung Hom, Hong Kong Recruiting -
The Hong Kong Polytechnic University, Department of Applied Social Sciences
Hung Hom, Kowloon, Hong Kong Not yet recruiting
Study contacts
- Principal investigator: Cehao Yu, PhD — The Hong Kong Polytechnic University
- Study coordinator: Cehao Yu, PhD
- Email: cehao.yu@polyu.edu.hk
- Phone: +852 3400 3012
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How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.