An interventional study of Static Lighting Condition (L1) and Dynamic Lighting Condition (L2) in Sleep, Physical Activity and Cognitive Function, sponsored by Well Living Lab, Inc.. Recruiting at 1 site in United States. Open to participants aged 60 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2023-08-07.
Sponsored by Well Living Lab, Inc. · Not applicable, Interventional, and Prevention
The goal of this randomized, cross-over, single-site trial followed by an exploratory third intervention is to understand how indoor lighting affects different measures of brain health in older adults living in independent living residences. This is a community based study occurring in a local senior living facility. The main question this study aims to answer is:
Participants will be exposed to three different indoor lighting conditions for 4 weeks each while performing the following tasks:
Results from these tasks will be compared within and between subjects to assess whether the different lighting conditions affect these different measures of brain health.
Well Living Lab, Inc. is the lead sponsor of 2 studies on the registry; 1 is open to participants now.
Counted across the registry records on this site, refreshed daily.
Exclusion Criteria:
Participants will first experience a static lighting condition (L1) then a dynamic lighting condition (L2). After, participants will experience another dynamic lighting condition (L3) with increased morning brightness compared to L2.
Behavioral: Static Lighting Condition (L1) · Behavioral: Dynamic Lighting Condition (L2) · Behavioral: Dynamic Lighting Condition (L3)
Participants will first experience a dynamic lighting condition (L2) then a static lighting condition (L1). After, participants will experience another dynamic lighting condition (L3) with increased morning brightness compared to L2.
Behavioral: Static Lighting Condition (L1) · Behavioral: Dynamic Lighting Condition (L2) · Behavioral: Dynamic Lighting Condition (L3)
This indoor lighting condition keeps a constant brightness and correlated color temperature.
This indoor lighting condition has increased brightness and more blue correlated color temperature in the morning hours followed by decreased brightness and less blue correlated color temperature in the afternoon and evening hours.
This exploratory indoor lighting condition matches the same pattern as L2 except the brightness in the morning hours is increased.
Total Sleep Time
Total sleep time per night in minutes as measured daily by a wearable device.
Time frame: Change in total sleep time per night over the course of each condition of the 16-week study.
Wake After Sleep Onset
Wake after sleep onset per night in minutes as measured daily by a wearable device.
Time frame: Change in wake after sleep onset per night over the course of each condition of the 16-week study.
Sleep State Duration
Sleep state duration per night in minutes as measured daily by a wearable device.
Time frame: Change in sleep state duration per night over the course of each condition of the 16-week study.
Sleep Quality
Self-report measurement of perceived sleep quality made daily via the Groningen Sleep Quality Survey.
Time frame: Change in self-reported sleep quality over the course of each condition of the 16-week study.
Steps Taken
Physical activity in steps per day as measured daily by a wearable device.
Time frame: Change in physical activity in steps per day over the course of each condition of the 16-week study.
Physical Activity
Physical activity in minutes per day as measured daily by a wearable device.
Time frame: Change in physical activity in minutes per day over the course of each condition of the 16-week study.
Working Memory
Task performance on a working memory assessment taken twice weekly.
Time frame: Change in working memory performance over the course of each condition of the 16-week study.
Task Switching
Task performance on a task switching assessment taken twice weekly.
Time frame: Change in task switching performance over the course of each condition of the 16-week study.
Response Inhibition
Task performance on a response inhibition assessment taken twice weekly.
Time frame: Change in response inhibition performance over the course of each condition of the 16-week study.
Sustained-Attention Reaction Time
Task performance on a sustained-attention reaction time assessment taken twice weekly.
Time frame: Change in sustain-attention reaction time performance over the course of each condition of the 16-week study.
Self-Reported Loneliness
Self-report measurement of loneliness assessed weekly via the UCLA Loneliness Scale.
Time frame: Change in self-reported loneliness over the course of each condition of the 16-week study.
Self-Reported Depression
Self-report measurement of depression assessed weekly via the Positive and Negative Affect Scale.
Time frame: Change in self-reported depression over the course of each condition of the 16-week study.
Self-Reported Mood
Self-report measurement of mood assessed weekly via the Depression, Anxiety, and Stress Scale.
Time frame: Change in self-reported mood over the course of each condition of the 16-week study.
Plan to share: No
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Well Living Lab, Inc.