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Inferring Calendar Event Attendance

Inferring Calendar Event Attendance. Elizabeth Mynatt and Joe Tullio Graphics, Visualization, and Usability Center College of Computing Georgia Institute of Technology http://www.cc.gatech.edu/fce/ecl. Informal Communication. Brief face-to-face conversation Regular meetings

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Inferring Calendar Event Attendance

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  1. Inferring Calendar Event Attendance Elizabeth Mynatt and Joe Tullio Graphics, Visualization, and Usability Center College of Computing Georgia Institute of Technology http://www.cc.gatech.edu/fce/ecl

  2. Informal Communication • Brief face-to-face conversation • Regular meetings • Irregular personal schedules • Overwhelmed communication channels • “Ambushing” • “I’ll ask my advisor during the seminar” • “You can find him at the faculty meeting”

  3. Problems with Calendars • Accuracy • Recurring appointments never removed • Conflicting appointments – which will user attend? • All-day events supercede routine ones • Privacy • Push vs. Pull • Primarily for personal use

  4. Overview • A Probabilistic Calendar • Bayesian model • System implementation • Learning through attendance logs • Application: Group calendar display • Visualizations • Related Work • Future Work – Calendars as Sensors

  5. Ambush System Diagram

  6. Attendance Model

  7. Attendance Model • Priority • Recurring? • Role? • Type of event? • Availability • Location • Length • All-day event?

  8. Ambush Experiences • Evaluation • Single user • 2.5 months, 200 appointments • Routine events stabilize • Novel events a problem • Hard to parse into node evidence • No prior knowledge

  9. Simple Visualizations

  10. Inside the Black Box • Graphical explanation of Bayesian model • Skeptical of output • Diagnosis of model • Build sense of trust with inference system • Provide quick analysis of relative node influences

  11. Black Box Visualization

  12. Related Work • Office Studies: • Groupware calendars: Palen, 1999 • Office communication: Ehrlich 1987 • Applications • Context-Aware Office Assistant: Yan, 2000 • Attention-sensitive Alerting: Horvitz et al, 1999 • Visualizing uncertainty/explanations • Visual Calendar: Beard et al, 1990 • Explanation: Druzdel, 1996 • Graphical Explanations: Madigan et al, 1996

  13. Future Work • Automatic sensing of attendance • Active badges • iButtons • More training, more users • Formal studies - iterate visualizations • Calendars as Sensors • Other application domains? • Ubicomp, Context-aware computing

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