1. Copyright Catherine M. Burns
Midterm
Short Answer Questions
1:30-3:30 here
Have an interview? See me.
Open Book
Book checks
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Copyright Catherine M. Burns

2. HUMAN COMPUTER INTERACTION
Chapter 15
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Copyright Catherine M. Burns

3. Copyright Catherine M. Burns
Overall Principles
Wickens p. 397
Match the system to the real world
Make the interface consistent internally and with relevant standards
Make the functioning of the system visible
Allow user control and freedom (exits, shortcuts)
Build in error tolerance
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Copyright Catherine M. Burns

4. What’s the principle behind…
Use color coding uniformly.
Use a uniform input syntax.
Indicate progress in task performance.
Have clearly marked exits
Avoid modes when possible
Make the repertoire of available actions salient
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5. Copyright Catherine M. Burns
Screen Design
Novices tend to over-use colour
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6. Copyright Catherine M. Burns
Styles of Interaction
Menus:
simple or hierarchical
require low memory or little experience
low levels of typing skills
infrequent tasks, fixed number of selections
gray out inactive items, keep descriptors distinct/consistent, order by convention or frequency of use
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7. Copyright Catherine M. Burns
Styles of Interaction
Fill in Forms
little experience
collecting data that can’t be anticipated
key issues around organization
indicate which fields are optional, have clear labels
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8. Copyright Catherine M. Burns
Styles of Interaction
Question-Answer
one question appears at a time
novice users
low frequency questions
clear language, minimize typing, good navigation
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9. Copyright Catherine M. Burns
Styles of Interaction
Command language
expert users
issue is consistent, memorable syntax
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10. Copyright Catherine M. Burns
Styles of Interaction
Function Keys
expert users
older style
shortcuts
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11. Copyright Catherine M. Burns
Styles of Interaction
Direct Manipulation
perform actions right on objects on the screen
most intuitive
intermediate users (novice may not know what can be manipulated)
icon-design, labels, indicating what can be manipulated
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12. Copyright Catherine M. Burns
Styles of Interaction
Natural Language
requires language translator on the computer
technology not very usable at this time
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13. Copyright Catherine M. Burns
Defining a User Group
Experience and Knowledge level
Frequency of Use
Novice and Expert users require different designs
Flexible designs will accommodate both
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14. Design for Novice Users
quick learnability
positive experience
low information requirements to improve efficiency
constraints that block out errors, high reversibility, use restrictions
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15. Copyright Catherine M. Burns
The Infrequent User
Learnability
Low Memory requirements - information in the interface, consistency, reduction of modes
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16. The Frequent Expert User
High information accessibility
Denser information displays
Short cuts
Ability to avoid or turn off “novice user” design features
Quicker access to more powerful features
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17. Types of Design Problems What type of user?
Internet browser
Airplane cockpit
Integral tables
Voice mail
Petroleum refining control room
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18. Copyright Catherine M. Burns
Models and Metaphors
Wickens p
Norman’s Human Action Cycle
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19. Copyright Catherine M. Burns
Mini exercise
Design a palm/PDA application for scoring golf (# strokes per hole)
What kind of users will you have?
What styles of interaction will you use, and when?
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20. Copyright Catherine M. Burns
Chapter 15
Designing help systems - read, notice, don’t worry about
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21. Copyright Catherine M. Burns
Database HCI and VR
Scan
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Copyright Catherine M. Burns