Sleep Clinical Trial
Official title:
Light, Health, and Productivity: Evaluating the Potentials of Biodynamic Lighting for Home Office Workers
This study examines the effectiveness of a biodynamic lighting intervention on the sleep, cognitive functions, and alertness of adults working from home. The biodynamic intervention is an innovative lighting solution that intends to harness both visual and non-visual effects of lighting through delivering varying intensities and spectra during working hours according to a preset protocol.
Status | Recruiting |
Enrollment | 25 |
Est. completion date | December 31, 2023 |
Est. primary completion date | December 31, 2023 |
Accepts healthy volunteers | Accepts Healthy Volunteers |
Gender | All |
Age group | 18 Years to 65 Years |
Eligibility | Inclusion Criteria: - Have an occupation of a dayshift (i.e., occurring between 6 AM and 8 PM) remote office worker, working from home for five days (Monday?Friday) a week with a maximum of 12 hours per day - Good health [self-reported medical history] - No evidence of sleep disorders [Pittsburgh Sleep Quality Index (PSQI) scores >5 are excluded] - No extreme chronotypes (extreme owl or lark) [Morningness-Evningness Questionnaire (MEQ) scores >70 or <30 are excluded; typical bedtime between 8 PM and 2 AM] - Normal color vision [as per Ishihara's Tests for Colour Deficiency] - No current or planned use of light therapy or light-altering devices (e.g., blue-blocking and/or tinted glasses and contact lenses) - No planned upcoming travel during the study participation period - Not pregnant Exclusion Criteria: - |
Country | Name | City | State |
---|---|---|---|
United States | ASU DeSmart Lab | Tempe | Arizona |
Lead Sponsor | Collaborator |
---|---|
Arizona State University | Korrus Inc. |
United States,
Type | Measure | Description | Time frame | Safety issue |
---|---|---|---|---|
Primary | Change in Nocturnal Sleep Duration (in minutes) as measured by actigraphy | Nocturnal Sleep Duration (in minutes) will be measured by Actigraphy. Longer sleep duration corresponds to improved sleep outcomes. | 24 hours everyday up to week 5 | |
Primary | Change in Percent Sleep Efficiency (total sleep time divided by time in bed) measured by actigraphy | Percent Sleep Efficiency measured by actigraphy. Higher percentage corresponds to higher sleep quality. | 24 hours everyday up to week 5 | |
Primary | Change in the Subjective Sleep quality as measured by a single Likert-like question qualitatively | This is included in the consensus sleep diary and consists of 1 question that is scaled from 1 to 7, with higher score corresponds to poor quality sleep. | everyday up to 5 weeks | |
Primary | Change in working memory as assessed by fractal 2-back score | Fractal 2-back score is based on number of correct responses. Higher test scores indicates better performance of working memory | Once per day, Monday to Friday, during week 1, 3, and 5 | |
Primary | Change in working Memory as assessed by Visual Object Learning Task (VOLT) score | Participants first memorize a set of 3-dimensional Euclidean shapes. During recall, participants are to distinguish between the initial shapes mixed with ten distractor shapes. Score is based on number of correct responses. | Once per day, Monday to Friday, during week 1, 3, and 5 | |
Primary | Change in median reaction time on Psychomotor Vigilance test | Psychomotor vigilance test(PVT) measures alertness and vigilant attention and is considered to be the gold standard measure of neurobehavioral effects of circadian misalignment and sleep loss. A shorter median reaction time corresponds to more attentive state. | Once per day, Monday to Friday, during week 1, 3, and 5 | |
Primary | Change in Balloon Analogue Risk Task (BART) score | Participants inflate balloons of unknown popping probability to obtain the highest reward. Each pump increases the potential reward. The potential reward is lost if the balloon pops. Scores are calculated by adding the number of pumps for unexploded balloons, with higher scores reflecting greater risk-taking. Range varies - explosions are at a random point between 1 and 128 pumps. | Once per day, Monday to Friday, during week 1, 3, and 5 | |
Primary | Change in subjective alertness as assessed by Stanford Sleepiness Scale (SSS) | SSS is a s self-reported Likert-type sleepiness scale which assess mental and physical sedation and sleepiness, respectively, at that moment and time. SSS only consists of 1 question that is scaled from 1 to 7, with 7 being a higher or worse score (i.e. more sleepy and sedated) | Once per day, Monday to Friday, during week 1, 3, and 5 | |
Secondary | Change in motor speed as assessed by Motor Praxis Task | Participants are to quickly touch ever-shrinking boxes. Each time a new box appears in a different location on the screen. A shorter reaction time corresponds to higher sensory motor speed. | Once per day, Monday to Friday, during week 1, 3, and 5 | |
Secondary | Change in measure of abstraction: score on abstract matching test | Participants select pairs of shapes that fit with another shape. Higher number of correct responses corresponds to higher measure of abstraction. | Once per day, Monday to Friday, during week 1, 3, and 5 | |
Secondary | Change in the spatial orientation: score on line orientation test | Participants are shown two lines at different angles, and are to rotate one line incrementally until it is parallel to the other. Higher scores corresponds to better spatial orientation. | Once per day, Monday to Friday, during week 1, 3, and 5 | |
Secondary | Change in complex scanning and visual tracking: score on Digit Symbol Substitution Task (DSST) | Participants touch the number paired to the symbol that matches the current target symbol. Higher score corresponds to better complex scanning and visual tracking capability. | Once per day, Monday to Friday, during week 1, 3, and 5 |
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