Evaluating the User Interface of a Ubiquitous Computing system Doorman

1
Evaluating the User Interface of a Ubiquitous
Computing system Doorman

• Kaj Mäkelä
• 30.9.2001

TampereUniversityComputerHumanInteractionGrou
p
2
The Ubicomp System Doorman

• Speech based UbiComp system
• Aim of the Doorman is to
• Identify the target of the visitors visit or the
  identity of the staff member
• Open the door and guide the visitors in TAUCHI
  premises
• Convey personal and organisational messages to
  staff members
• All the visitors should be served in some way
• Outputs
• Speech synthesis
• Anthropomorphic guide robot using pointing
  gestures
• Inputs
• Speech recognition, speaker recognition
• Switches (door, doorbell) and IR sensor
• Based on Jaspis architecture

3
The Doorman system
4
The Wizard of Oz Experiment

• Testing the current dialogue and the interaction
  model, how well they serve the users
• Part of the iterative design process
• System fully implemented, only speech recognition
  missing
• Speech recognition simulated by a human Wizard
• A Wizard application for giving manual speech
  recognition inputs
• All the speech inputs and system prompts were
  recorded for analysis and transcripted
• The behaviour of the users with the robot was
  observed

5
The Results

• 74 cases 22 visitors, 52 staff members?too
  little data for generalisation
• Problems found
• System prompts too long and annoying?Needs to be
  reformed and shortened
• System not competitive with a key? System
  initiative needs to be increased to gain more
  users

6
Conclusion

• The experiment gave valuable information on the
  actual use and the behaviour of the users
• Brought up many design issues and problems and
  help to develope the system further
• Modularity of the Jaspis architecture made the
  Woz experiment easy
• We recommend using the Woz experiments as a part
  of the iterative design process of UbiComp
  systems

7
Contact

• Tampere Unit for Computer-Human Interaction
  (TAUCHI)
• http//www.cs.uta.fi/hci/
• Speech Pervasive Interaction group (SPI)
• http//www.cs.uta.fi/hci/spi/
• Doorman system (Ovimies in Finnish)
• http//www.cs.uta.fi/hci/spi/Ovimies/
• Jaspis architecture
• http//www.cs.uta.fi/hci/spi/Jaspis/
• Kaj Mäkelä, e-mail kaj_at_cs.uta.fi