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.
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.
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.
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.
Cohort
Cross-sectional
Computer-Based Visual Perception Tasks
Other interventionParticipants will complete computer-based visual perception tasks, including a colour perception task and a binocular rivalry task. These tasks are used to measure individual differences in perceptual responses and are not intended as a clinical intervention.
Colour perception adjustment metrics
Colour perception will be measured using a computer-based colour adjustment task. Participants will adjust the appearance of a target object or stimulus, and outcome variables will include adjustment values in colour space, such as chromaticity, hue, saturation, or luminance-related measures, depending on the final task implementation. These measures will be used to characterise individual differences in colour perception.
Binocular rivalry perception metrics
Binocular rivalry will be measured using a computer-based visual task in which different images or stimuli are presented separately to the two eyes. Outcome variables may include perceptual dominance duration, predominance, alternation rate, switch rate, or related behavioural responses. These measures will be used to characterise individual differences in binocular rivalry perception.
Chronotype score
Chronotype will be assessed using a self-report questionnaire. The resulting score will be used to examine whether individual differences in colour perception and binocular rivalry are associated with morningness-eveningness preference.
Sleep-related measures
Sleep-related variables will be assessed using self-report questionnaire measures, such as recent sleep duration, sleep quality, or sleep timing. These measures will be used to examine whether sleep-related factors are associated with individual differences in colour perception and binocular rivalry.
Subjective fatigue
Subjective fatigue will be assessed using self-report ratings, such as sleepiness or fatigue scales. These measures will be used to examine whether current fatigue or alertness is associated with colour perception and binocular rivalry measures.
Click on the lead sponsor to view all of their trials.
This trial is not recruiting at the moment. You can still explore other options:
