Imran Hussain

1
Virtual University Human-Computer Interaction
Lecture 27Behavior Form Part II

• Imran Hussain
• University of Management and Technology (UMT)

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In Last Lecture

• Software Postures
• Sovereign posture (full-screen programs outlook,
  word)
• Transient posture (temporary programs
  calculator, volume control)
• Daemonic posture (work in background taskbar
  icons)
• Auxiliary posture (streaming audio in browser
  pane)

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In Todays Lecture

• Postures for Web
• Postures for other Platforms
• Kiosks (transient)
• Handheld Devices (transient)
• Appliances (microwaves, transient)
• Orchestration and Flow
• Eliminating Excise

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Web Postures

• Information-oriented sites
• Transaction-oriented sites
• Portals

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Other Platforms

• Kiosks
• Handheld devices
• Appliances

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Introduction
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User in harmonious frame of mind ? user is
productive ? software productive
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Flow and Transparency
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What is Flow?
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How to Improve Flow?
11
How to Make an Interface Invisible?
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Follow Mental Models
13
Direct, Dont Discuss
14
Keep Tools Close At Hand
15
Mode-less Feedback
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Orchestration
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What is Orchestration?
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How can we Ensure Good Orchestration?
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Adding Finesse Less is More
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Distinguishing Possibility from Probability
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Providing Comparisons
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Using Graphical Input
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Reflecting Program Status
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Avoiding Unnecessary Reporting
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Avoiding Blank Slates
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Command Invocation vs. Configuration
27
Asking Questions vs. Providing Choices
28
Hiding Ejector Seat Levers
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Excise
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What is Excise?
31
GUI Excise
32
Excise and Expert Users
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Training Wheels
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Pure Excise
35
Visual Excise
36
Determining What is Excise
37
Stopping the Proceedings
38
Errors, Notifiers and Confirmation Messages
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Making the user ask permission
40
Protecting us from ourselves
41
unresponsiveness
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Common excise tips