Characterising Individual Differences in Colour Perception and Binocular Rivalry and Their Associations With Chronotype, Sex, and Sleep
试验速览
- 阶段
- 不适用
- 状态
- 招募中
- 入组人数
- 128
- 试验地点
- 3
- 主要终点
- Colour perception adjustment metrics
研究概览
简要总结
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.
详细描述
Colour perception and binocular rivalry both show variability across individuals. However, the extent to which these individual differences are stable and whether they are associated with personal or physiological factors remains unclear. This study will use behavioural visual perception tasks to measure individual differences in colour perception and binocular rivalry. Participants will complete a colour perception task and a binocular rivalry task, along with questionnaire measures related to chronotype, sleep, fatigue, and demographic characteristics including sex.
The primary aim is to determine whether measurable individual differences are present in colour perception and binocular rivalry performance. The secondary aim is to examine whether these differences are associated with chronotype, sex, sleep-related variables, and subjective fatigue. The study is observational and does not involve a clinical intervention, drug, biologic product, or medical device.
研究设计
- 研究类型
- Observational
- 观察模型
- Cohort
- 时间视角
- Cross Sectional
入排标准
- 年龄范围
- 18 Years 至 25 Years（Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •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.
排除标准
- •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.
研究组 & 干预措施
Healthy Adult Participants
Healthy adult volunteers aged 18 to 25 years with normal or corrected-to-normal visual acuity and normal colour vision, recruited from the university and surrounding community. In a single laboratory session, participants complete computer-based colour perception and binocular rivalry tasks and self-report questionnaires on chronotype, sleep, fatigue, and demographic characteristics.
干预措施: Computer-Based Visual Perception Tasks (Other)
结局指标
主要结局
Colour perception adjustment metrics
时间窗: During a single laboratory testing session
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
时间窗: During a single laboratory testing session
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.
Mean colour-adjustment values on the colour perception task
时间窗: Day 1 (single laboratory session)
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.
Mean perceptual dominance duration during binocular rivalry
时间窗: Day 1 (single laboratory session)
Binocular rivalry is measured with a computer-based dichoptic task in which a different image is presented to each eye. Perceptual dominance duration is the mean length of time, in seconds, that one stimulus remains exclusively visible before perception switches to the other. Longer mean durations indicate more stable, slower-switching rivalry.
Mean alternation rate during binocular rivalry
时间窗: Day 1 (single laboratory session)
Binocular rivalry is measured with the same computer-based dichoptic task. Alternation rate is the mean number of perceptual switches between the two stimuli per minute of viewing. Higher alternation rates indicate faster perceptual switching between the two eyes' images.
次要结局
- Chronotype score(During a single laboratory testing session)
- Sleep-related measures(Up to 7 days before or around the laboratory testing session)
- Subjective fatigue(Immediately before and after the visual perception tasks during a single laboratory testing session)
- Morningness-Eveningness Questionnaire (MEQ) score(Day 1 (single laboratory session))
- Pittsburgh Sleep Quality Index (PSQI) global score(Administered once, within 7 days before or at the single laboratory session (Day 1); the PSQI assesses sleep over the preceding 1 month.)
- Karolinska Sleepiness Scale (KSS) score(Day 1: assessed immediately before and immediately after the visual perception tasks, which are completed within a single session lasting up to approximately 1 hour.)
研究者
Dr YU Cehao
Research assistant professor
The Hong Kong Polytechnic University