Visual Perception, Binocular Rivalry, and Fatigue-Related Individual Differences in Colour and Illumination Judgement

Starting soon

Conditions studied: Colour Perception, Color Perception, Binocular Rivalry

In brief

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.

Key facts

Study ID

NCT07671144

Run by

The Hong Kong Polytechnic University

People needed

128

Starts

2026-07-01

Expected to finish

2026-12-01

Last updated by the study team

2026-07-06

Who can join

Age: 18 and older, up to 25. Sex: any. Healthy volunteers: accepted.

You may qualify if…

• 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.

You may not qualify if…

• 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 is running

• The Hong Kong Polytechnic University, Department of Applied Social Sciences — Hung Hom, Kowloon, Hong Kong

Full record on ClinicalTrials.gov

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