Multi-scale Modeling of Sleep Behaviors in Social Networks

Study Overview
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Brief Summary
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The project is designed to document in college undergraduates the relationships among sleep/wake timing and duration, use of mobile phones and other electronic devices, food timing and content, self-reported mood and physiological measures.

Detailed Description
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College undergraduates are studied in cohorts of   50 in fall or spring semesters. They complete diaries once in the morning and once in the evening about sleep/wake timing, timing of social and school activities, and mood. They wear physiological sensors. They install (1) an application on their mobile phone that tracks timing, duration and de-identified sender/recipient of phone calls and text messages, use of internet or apps (but not the content or names of those internet sites and apps) and (2) meal content and timing. They also spend at least one overnight session providing saliva samples for later assay for hormones.

Official Title
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Multi-scale Modeling of Sleep Behaviors in Social Networks

Conditions
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Healthy Volunteers

Intervention / Treatment
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* Other: No intervention. Observation only


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: undergraduate at institution at which we have permission to perform study owning a mobile device on which the phone app can be installed ability to wear the wrist-worn sensors Exclusion Criteria: no travel outside one time zone starting approximately 2 weeks before monitoring begins through end of approximately one month of monitoring. participation in a prior group studied

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| College students<br>College students will be monitored and will complete online surveys, install apps on their mobile phones, wear physiological sensors and provide saliva samples for later assay. | Other: No intervention. Observation only<br>* No intervention. Observation only<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Timing of sleep and wake | Timing of self-reported sleep onset and wake onset | Approximately one month | 
| Timing of phone use (e.g., mobile phone calls, text messages, applications and internet use) | Timing of phone use (e.g, mobile phone calls, text messages, applications and internet use) | Approximately one month | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Mood | Self-reported mood using a linear non-numeric scale | Approximately one month | 
| Activity levels | Activity levels collected every minute using a wrist-worn device | approximately one month | 
| Light exposure levels | Light exposure levels collected every minute using a wrist-worn device | approximately one month | 
| Food choice | Content of food | approximately one month | 
| Circadian phase | Calculated time of melatonin phase as a marker of circadian rhythms | one day | 
| Electrodermal activity | Electrodermal activity as measured using a wrist-worn device | approximately one month | 
| Timing of meals | Time meals are eaten | approximately one month | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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sleep, social networks, undergraduates, mood, circadian rhythms