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- posterMay 2017
Is fitbit fit for sleep-tracking?: sources of measurement errors and proposed countermeasures
PervasiveHealth '17: Proceedings of the 11th EAI International Conference on Pervasive Computing Technologies for HealthcareMay 2017, Pages 476–479https://doi.org/10.1145/3154862.3154897It is now easy to track one's sleep through consumer wearable devices like Fitbit from the comfort of one's home. However, compared to clinical measures, the data generated by such consumer devices is limited in its accuracy. The aim of this paper is to ...
- abstractMay 2016
Daily & Hourly Adherence: Towards Understanding Activity Tracker Accuracy
CHI EA '16: Proceedings of the 2016 CHI Conference Extended Abstracts on Human Factors in Computing SystemsMay 2016, Pages 3211–3218https://doi.org/10.1145/2851581.2892438We tackle the important problem of understanding the accuracy of activity tracker data. To do this, we introduce the notions of daily and hourly adherence, key aspects of how consistently people wear trackers. We hypothesise that these measures provide ...
- research-articleSeptember 2014
Tracking physical activity: problems related to running longitudinal studies with commercial devices
UbiComp '14 Adjunct: Proceedings of the 2014 ACM International Joint Conference on Pervasive and Ubiquitous Computing: Adjunct PublicationSeptember 2014, Pages 699–702https://doi.org/10.1145/2638728.2641320The problems with inactive and sedentary lifestyles are widely recognised. People believe that activity tracking systems, such as the Fitbit, may aid them in meeting recommended levels of physical activity. Similar systems have been the subject of ...
- posterApril 2014
StepCity: a preliminary investigation of a personal informatics-based social game on behavior change
CHI EA '14: CHI '14 Extended Abstracts on Human Factors in Computing SystemsApril 2014, Pages 2371–2376https://doi.org/10.1145/2559206.2581326Encouraging physical activity is an important public health issue. In this study, we set out to see if a game could be used to motivate people to be more active. We recruited 74 subjects to wear Fitbits -- a personal activity monitoring device that ...
- short-paperOctober 2013
An evaluation of wearable activity monitoring devices
PDM '13: Proceedings of the 1st ACM international workshop on Personal data meets distributed multimediaOctober 2013, Pages 31–34https://doi.org/10.1145/2509352.2512882This paper examines an increasingly relevant topic in the multimedia community of wearable devices that record the physical activity of a user throughout a day. While activity and other accelerometry-based data has been shown effective in various ...
- short-paperJune 2013
Quantified recess: design of an activity for elementary students involving analyses of their own movement data
IDC '13: Proceedings of the 12th International Conference on Interaction Design and ChildrenJune 2013, Pages 273–276https://doi.org/10.1145/2485760.2485822Recess is often a time for children in school to engage recreationally in physically demanding and highly interactive activities with their peers. This paper describes a design effort to encourage fifth-grade students to examine sensitivities associated ...