Light, Health, and Productivity: Evaluating the Potentials of Biodynamic Lighting for Home Office Workers
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 20
- 试验地点
- 2
- 主要终点
- Change in Percent Sleep Efficiency (total sleep time divided by time in bed) measured by actigraphy
研究概览
简要总结
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.
详细描述
The practice of working from home was widespread well before the 2020 Covid-19 pandemic; The Covid-19 pandemic pressed the fast-forward button on this trend. One of the biggest business concerns associated with working from home is how to maintain employees' productivity. Lighting has been proven as the main environmental element that significantly impacts office workers' health, sleep, mood, comfort, cognitive functions, and, consequently, productivity. One unintended aspect of working from home is the reduction in light exposure, especially in the contrast between the daytime and evening.
The effect of lighting on the office workers, including those working from home, could be roughly divided into two categories: visual route and non-visual route. Both visual and non-visual routes have received significant attention from researchers over the past decade. Yet, current literature lacks research involving a comprehensive approach that systematically evaluates the potential of biodynamic lighting interventions in home workplaces. None of the previous studies have evaluated lighting conditions in the home workplaces nor investigated the effects of lighting interventions on the health and productivity of adults working from home. With the rapid increase in the number of people moving to work from home, special attention should be paid to the lighting condition in home offices and its impacts on these 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. Additionally, this study aims to compare the homeworkers' lighting conditions, impacts, and daily light exposure and how it is relevant to their sleep pattern and health. The specific aims of this study include:
- Aim 1: Examine the potential benefits of applying a biodynamic lighting condition in home offices for promoting sleep, cognitive functions, and alertness in remote workers.
- Aim 2: Objectively explore remote workers' daily light exposure pattern and model its relationship with their sleep quality.
Findings from this interdisciplinary study will provide insight into the potential benefits of applying biodynamic lighting in home workplaces for improving health and well-being in remote workers. Findings will also assist the lighting industry in providing necessary lighting technology and products aligned with the uprising trend of working from home.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Crossover
- 主要目的
- Other
- 盲法
- Double (Participant, Outcomes Assessor)
入排标准
- 年龄范围
- 18 Years 至 65 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •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
排除标准
- 未提供
结局指标
主要结局
Change in Percent Sleep Efficiency (total sleep time divided by time in bed) measured by actigraphy
时间窗: 24 hours everyday up to week 5
Percent Sleep Efficiency measured by actigraphy. Higher percentage corresponds to higher sleep quality.
Change in Nocturnal Sleep Duration (in minutes) as measured by actigraphy
时间窗: 24 hours everyday up to week 5
Nocturnal Sleep Duration (in minutes) will be measured by Actigraphy. Longer sleep duration corresponds to improved sleep outcomes.
Change in the Subjective Sleep quality as measured by a single Likert-like question qualitatively
时间窗: everyday up to 5 weeks
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.
Change in working memory as assessed by fractal 2-back score
时间窗: Once per day, Monday to Friday, during week 1, 3, and 5
Fractal 2-back score is based on number of correct responses. Higher test scores indicates better performance of working memory
Change in median reaction time on Psychomotor Vigilance test
时间窗: Once per day, Monday to Friday, during week 1, 3, and 5
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.
Change in subjective alertness as assessed by Stanford Sleepiness Scale (SSS)
时间窗: Once per day, Monday to Friday, during week 1, 3, and 5
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)
Change in working Memory as assessed by Visual Object Learning Task (VOLT) score
时间窗: Once per day, Monday to Friday, during week 1, 3, and 5
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.
Change in Balloon Analogue Risk Task (BART) score
时间窗: Once per day, Monday to Friday, during week 1, 3, and 5
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.
次要结局
- Change in measure of abstraction: score on abstract matching test(Once per day, Monday to Friday, during week 1, 3, and 5)
- Change in complex scanning and visual tracking: score on Digit Symbol Substitution Task (DSST)(Once per day, Monday to Friday, during week 1, 3, and 5)
- Change in motor speed as assessed by Motor Praxis Task(Once per day, Monday to Friday, during week 1, 3, and 5)
- Change in the spatial orientation: score on line orientation test(Once per day, Monday to Friday, during week 1, 3, and 5)
研究者
Nina Sharp
Assistant Professor
Arizona State University