Related Experiment Video
Updated: Mar 24, 2026
08:36
Collecting Sleep, Circadian, Fatigue, and Performance Data in Complex Operational Environments
Published on: August 8, 2019
13.0K
Automatic detection of social rhythms in bipolar disorder
Saeed Abdullah1, Mark Matthews2, Ellen Frank3
1Information Science, Gates Hall, Cornell University, Ithaca, NY 14853, USA sma249@cornell.edu.
Summary
Smartphone sensing can automatically assess the Social Rhythm Metric (SRM) for individuals with bipolar disorder (BD). This technology offers a feasible way to monitor rhythmicity, a key indicator of wellbeing.
Area of Science:
- Digital health
- Psychiatry
- Wearable technology
Background:
- The Social Rhythm Metric (SRM) is a validated measure of stability and rhythmicity in bipolar disorder (BD).
- Traditional SRM assessment relies on manual patient input, which can be burdensome and infrequent.
- Objective, continuous monitoring of social rhythms is needed for better BD management.
Purpose of the Study:
- To determine if passively collected smartphone data can accurately assess the SRM in individuals with BD.
- To explore the feasibility of using automated sensing for inferring behavioral and contextual patterns relevant to BD.
Main Methods:
- Seven patients with BD participated in a 4-week study.
- Smartphones passively collected sensor data (accelerometer, microphone, location, communication).
- Participants also completed daily SRM entries via a smartphone app.
Main Results:
- Automated sensing successfully inferred SRM scores, with a generalized model achieving an RMSE of 1.40.
- Personalized models further enhanced accuracy, yielding a mean RMSE of 0.92.
- Classifiers accurately predicted stable (SRM ≥3.5) and unstable (SRM <3.5) states (precision: 0.85, recall: 0.86).
Conclusions:
- Passive smartphone sensing is a feasible method for inferring rhythmicity in individuals with BD.
- This approach can provide objective, continuous monitoring of a key marker for wellbeing.
- Digital health tools show promise for improving the management of bipolar disorder.
Related Concept Videos
01:30Bipolar Disorder
1.3K
Bipolar disorder is a chronic mental health condition marked by significant mood fluctuations, including episodes of mania and depression. Elevated energy levels, heightened mood or irritability, impulsive behavior, reduced sleep needs, rapid speech, racing thoughts, inflated self-esteem, and distractibility characterize mania. Individuals with bipolar disorder often alternate between depressive and manic states, with periods of emotional stability lasting an average of six months to a year.
1.3K
02:19Circadian Rhythms and Gene Regulation
4.7K
The biological clock is involved in many aspects of regulating complex physiology in all animals. It was in 1935 when German zoologists, Hans Kalmus and Erwin Bünning, discovered the existence of circadian rhythm in Drosophila melanogaster. However, the internal molecular mechanisms behind the circadian clock remained a mystery until 1984, when Jeffrey C. Hall, Michael Rosbash, and Michael W. Young discovered the expression of the Per gene oscillating over a 24-hour cycle. In subsequent...
4.7K
02:19Circadian Rhythms and Gene Regulation
2.5K
2.5K
02:45Biological Clocks and Seasonal Responses
42.0K
The circadian—or biological—clock is an intrinsic, timekeeping, molecular mechanism that allows plants to coordinate physiological activities over 24-hour cycles called circadian rhythms. Photoperiodism is a collective term for the biological responses of plants to variations in the relative lengths of dark and light periods. The period of light-exposure is called the photoperiod.
42.0K
01:19Management of Insomnia
767
The sleep cycle, an integral part of human health, consists of several stages with distinct characteristics and functions. It begins with a transition from wakefulness to sleep, known as the light sleep phase, followed by the restorative deep sleep phase, essential for physical recovery and growth. The cycle concludes with the Rapid Eye Movement (REM) phase, characterized by high brain activity and vivid dreaming. Insomnia, a prevalent sleep disorder, involves difficulty falling asleep, staying...
767
01:15Chronopharmacokinetics: Circadian Rhythms and Influence on Drug Response
450
Circadian rhythms are cyclic changes that are crucial in plasma drug concentrations. Various standard circadian parameters, including core body temperature, heart rate, and other cardiovascular factors, directly impact disease states and the therapeutic response to drug therapy.
The time of drug administration is an important factor to consider, as it can influence the toxic dose of a drug. For example, a study conducted by Prins et al. in 1997 examined the effects of the timing of...
The time of drug administration is an important factor to consider, as it can influence the toxic dose of a drug. For example, a study conducted by Prins et al. in 1997 examined the effects of the timing of...
450