A Short Workshop on Next Steps Towards Long-Term Self Tracking, CHI'18 Montreal, Canada. Pdf: https://arxiv.org/pdf/1804.04855.pdf Workshop site: http://longtermtracking.offis.de/

1. Activity Self-Tracking with Smart
Phones: How to Approach Odd
Measurements?
Gabriela Villalobos-Zúñiga
Mauro Cherubini
A Short Workshop on Next Steps Towards Long Term Self Tracking

2. 4th Risk Factor
For global
Mortality

3. Lack of exercise
causes
3.2 Million
deaths worldwide
annually
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4. Growing Body of Research

5. Individual forgets to wear
Relies on battery life
Limitations
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6. Accurate prediction
Solution
Previously used in
research
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7. Advantages
Silent observer
Battery Awareness
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8. Advantages
Present in daily
activities
Ecological Validity
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9. Pearls of Wisdom
Uses steps to
measure
physical activity
Motivational
Messages to influence
physical activity
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10. Pearls of Wisdom
App should be
open for
synchronization
Daily message
with steps goal
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11. Pearls of Wisdom
June 2017 - March 2018
10 month period
230 participants
62% female | 38% male
average age 21
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12. Technology
Data base of
Physical activity
Constant running
service
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13. Challenges
Unreliability of the
sensor to very low
physical activity
Health App
configuration
changes

14. Challenges
Micro and Macro Holes
in the dataset

15. Discussion
Which method should we
use to process micro-
holes in the dataset?
What are the possible
explanations for NAs
being returned from
Apple HealthKit?
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16. Discussion
How to best exploit
iPhone background
mode for experimental
purposes?
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17. Conclusion
Clear and reliable
data is central to
long-term tracking
Trackers capacity
play a crucial role to
obtain this data
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18. gabriela.villalobos@unil.ch
http://hec.unil.ch/people/gvillalobos
http://wp.unil.ch/persuasivelab
A Short Workshop on Next Steps Towards Long Term Self Tracking
mauro.cherubini@unil.ch
http://hec.unil.ch/people/mcherubini