CS 407 Human Computer Interface

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CS 407 Human Computer Interface

• Class 37
• Friday, November 19, 1999

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Thought for the Day

• Don't tell me I'm burning the candle at both ends
  
• tell me where to get more wax!!

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Your Job Interview?

The cartoon that was on this page in class was
found at Todays Cartoon by Randy Bergen.
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Todays Topics

• Chapter 13 Groupware

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Project 2 Assignment

• On the web site
• Any questions about Project 2?

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Chapter 13

• Groupware

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The Time/Space Matrix
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Classification by Function

• Cooperative work involves
• P Participants who are working
• A Artifacts upon which they work

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Email and bulletin boards

• Asynchronous/remote
• Familiar and most successful groupware
• Differences between email and BBS
• Fan out
• Onetoone or Onetomany
• Control
• Sender, Administrator, or Recipient

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Structured message systems

• Asynchronous/remote
• Super email --- cross between email and DB
• Sender fills in special fields
• Recipient filters incoming mail based on field
• But, work by the sender benefit for the
  recipient.
• Conflict
• Global structuring by designer
• vs.
• Local structuring by participants.

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Video conferences communication

• Synchronous/remote
• Technology emerging ISDN video compression
  (bandwidth is exploding!)
• Major uses
• Video conferences
• Pervasive video for social contact
• Integration with other applications

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Video conferences communication

• Often cheaper than facetoface meetings
  (telecommunications costs vs. air flights)
• But not a substitute
• Small field of view
• Lack of reciprocity
• Poor eye contact
• Pictures, Page 472

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Virtual Collaborative Environments

• Virtual Reality used to collaborate.
• Virtual person an embodiment or avatar.
• Text is difficult
• To read
• To position
• To point at

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Meeting decision support systems

• In design, management and research, we want to
• Generate ideas
• Develop ideas
• Record ideas
• Primary emphasis --- common understanding

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Meeting decision support systems (2)

• Three types of system
• Argumentation tools
• Asynchronous colocated
• Recording the arguments for design decisions
• Meeting rooms
• Synchronous colocated
• Electronic support for facetoface meetings
• Shared drawing surfaces
• Synchronous remote
• Shared drawing board at a distance

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Argumentation tools

• Asynchronous colocated
• Hypertext like tools to record design rationale
• Two purposes
• Reminding the designers of the reasons for
  decisions
• Communicating rationale between design teams
• Mode of collaboration
• Very long term
• Sometimes synchronous use also

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Argumentation tools (cont.)

• Example
• gIBIS (graphical Issue Based Information System)
  various node types including
• Issues
• e.g., number of mouse buttons'
• Positions
• e.g., only one button'
• Arguments
• e.g., easy for novice'
• Linked by relationships such as
• Argument supports position
• e.g., easy for novice' supports only one
  button'

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Meeting rooms

• Synchronous colocated
• Electronic support for facetoface meetings
• Individual terminals (often recessed)
• Large shared screen (electronic whiteboard)
• Special software
• U or C shaped seating around screen
• Various modes
• Brainstorming, private use, WYSIWIS
• WYSIWIS --- what you see is what I see'
• All screens show same image
• Any participant can write/draw to screen

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Typical meeting room
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Issues for cooperation

• Argumentation tools
• Concurrency control
• Two people access the same node
• One solution is node locking
• Notification mechanisms
• Knowing about others' changes
• Meeting rooms
• Floor holders one or many?
• Floor control policies
• Who can write and when?
• Solution locking social protocol
• Group pointer for deictic reference
  (this and that)