Evaluating LocationBased Reminders Timothy Y' Sohn, Kevin A' Li, Gunny Lee, William Griswold Compute

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Evaluating Location-Based Reminders Timothy Y.
Sohn, Kevin A. Li, Gunny Lee, William
GriswoldComputer Science and EngineeringUniver
sity of California, San Diego

• Motivation
• People use special messages everyday to remind
  themselves to attend to certain tasks These
  reminders take the form of handwritten notes,
  email, post-it notes, and calendar programs.
• These formats do not take advantage of context
  in determining when to deliver reminders.
• Studies have shown that location can be useful,
  but because of limited sensing technologies,
  studies have been confined to research labs.
• Cellular phones are widely deployed and the
  technology exists to provide location detection
  on them.

• Approach
• We have built an application called Place-it
  that takes advantage of location positioning to
  determine when to deliver reminders
• Usage You want to remind yourself to send your
  friend John an e-mail when you get home. You post
  a reminder to send john email for Home. When
  you arrive at Home, your phone will alert you
  to send John an email.

• Evaluation
• A study was conducted examining how effective a
  location-based reminder application would be,
  deployed on cellular phones.
• We installed Place-it on 10 Nokia 6600 phones
  which were distributed to users who already had
  cellular phones. They used their own SIM cards,
  so had access to their contact lists.
• Study participants used the application for two
  weeks
• Results suggest location based reminders
  deployed on cellular phones can be very
  effective, given accurate location positioning.