[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"health-study-detail:100644589":3},{"organization":4,"armGroups":7,"interventions":13,"overallOfficials":10,"centralContacts":18,"locations":28,"responsibleParty":44,"collaborators":10,"id":48,"slug":49,"hasResults":50,"nctId":51,"briefTitle":52,"officialTitle":53,"acronym":10,"eligibilityCriteria":54,"healthyVolunteers":55,"sex":56,"minAge":57,"maxAge":58,"enrollmentInfo":59,"targetDuration":10,"studyType":62,"phases":10,"briefSummary":63,"conditions":64,"keywords":68,"overallStatus":78,"whyStopped":10,"lastUpdateSubmitDate":79,"lastUpdatePostDateStruct":80,"startDateStruct":83,"completionDateStruct":85,"leadSponsor":87,"locationsCount":88},{"fullName":5,"class":6},"The Hong Kong Polytechnic University","OTHER",[8],{"label":9,"type":10,"description":10,"interventionNames":11},"Healthy Adult Participants",null,[12],"Other: Computer-Based Visual Perception Tasks",[14],{"type":6,"name":15,"description":16,"armGroupLabels":17,"otherNames":10},"Computer-Based Visual Perception Tasks","Participants 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.",[9],[19,24],{"name":20,"role":21,"phone":22,"phoneExt":10,"email":23},"Cehao Yu, PhD","CONTACT","+852 3400 3012","cehao.yu@polyu.edu.hk",{"name":25,"role":21,"phone":26,"phoneExt":10,"email":27},"Junkai Che, Master","+852 9783 8643","junkai.che@connect.polyu.hk",[29],{"facility":30,"status":10,"city":31,"state":32,"zip":10,"country":33,"countryCode":34,"cosmosGeoPoint":35,"geoPoint":40,"contacts":41},"The Hong Kong Polytechnic University, Department of Applied Social Sciences","Hung Hom","Kowloon","Hong Kong","HK",{"type":36,"coordinates":37},"Point",[38,39],114.18532,22.30715,{"lat":39,"lon":38},[42,43],{"name":20,"role":21,"phone":22,"phoneExt":10,"email":23},{"name":25,"role":21,"phone":26,"phoneExt":10,"email":27},{"type":45,"investigatorFullName":46,"investigatorTitle":47,"investigatorAffiliation":5,"oldNameTitle":10,"oldOrganization":10},"PRINCIPAL_INVESTIGATOR","Dr YU Cehao","Research assistant professor","100644589","visual-perception-binocular-competition-and-fatigue-related-individual-differences-in-colour-and-illumination-judgement-100644589",false,"NCT07671144","Visual Perception, Binocular Competition, and Fatigue-Related Individual Differences in Colour and Illumination Judgement","Characterising Individual Differences in Colour Perception and Binocular Rivalry and Their Associations With Chronotype, Sex, and Sleep","Inclusion Criteria:\n\n* Adults aged 18 years or older.\n* Normal or corrected-to-normal visual acuity.\n* Normal or corrected-to-normal binocular vision.\n* Normal colour vision, or no self-reported colour vision deficiency.\n* Able to understand the study instructions and provide informed consent.\n* Able to complete computer-based visual perception tasks and self-report questionnaires.\n\nExclusion Criteria:\n\n* Self-reported colour vision deficiency.\n* Uncorrected visual impairment or eye conditions that may interfere with visual perception tasks.\n* Strabismus, amblyopia, or other binocular vision problems that may interfere with binocular rivalry testing.\n* History of neurological disorders, photosensitive epilepsy, or severe sensitivity to flickering visual stimuli.\n* Current condition or medication that, in the investigator's judgment, may substantially affect visual perception, attention, or task performance.\n* Inability to complete the task procedures or provide valid responses.",true,"ALL","18 Years","25 Years",{"count":60,"type":61},128,"ESTIMATED","OBSERVATIONAL","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.",[65,66,67],"Colour Perception","Color Perception","Binocular Rivalry",[69,70,71,72,73,74,75,76,77],"Colour perception","Color perception","Binocular rivalry","Individual differences","Chronotype","Sleep","Subjective fatigue","Sex differences","Visual perception","NOT_YET_RECRUITING","2026-06-22",{"date":81,"type":82},"2026-06-26","ACTUAL",{"date":84,"type":61},"2026-07",{"date":86,"type":61},"2026-12",{"name":5,"class":6},1]