Context Transitions: User identification and comparison of mobile device motion data

Thomas Lovett, Eamonn O'Neill

Research output: Chapter or section in a book/report/conference proceedingChapter or section

1 Citation (SciVal)


In this paper, we study a time-critical facet of context-awareness: context transitions, which we model as changes in specific context types over time, e.g., activity or location. We present results from a user-centred field study involving participant interviews and motion data capture from two mobile device sensors: the accelerometer and magnetic field sensor. The results show how the participants subjectively interpret their daily context transitions with variable granularity, and a comparison of these context transitions with mobile device motion data shows how the motion data poorly reflect the identified transitions. The results imply that care should be taken when representing and modelling users' subjective interpretations of context, as well as the objective nature of context sensors. Furthermore, processing and usability trade-offs should be made if real-time on-device transition detection is to be implemented.
Original languageEnglish
Title of host publicationActivity Context Representation: Techniques and Languages - Papers from the 2011 AAAI Workshop, Technical Report
Place of PublicationEl Segundo, CA.
PublisherAI Access Foundation
Number of pages6
Publication statusPublished - Aug 2011
Event2011 AAAI Workshop, August 7, 2011 - August 8, 2011 - San Francisco, CA, USA United States
Duration: 1 Aug 2011 → …

Publication series

NameAAAI Workshop - Technical Report
PublisherAI Access Foundation


Conference2011 AAAI Workshop, August 7, 2011 - August 8, 2011
Country/TerritoryUSA United States
CitySan Francisco, CA
Period1/08/11 → …


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