1. CSC USI
Class Meeting 2
August 30, 2006

2. The Players User – the player with choice
System – the player with a program
Interface – the player who enhances communication between the user and the system
Designer – the player who anticipates the user’s choices

3. Some Interface Styles GUI DMI WIMP Command line
Graphical User Interface
DMI
Direct Manipulation Interface
WIMP
Windows, Icons, Menus, Pointer
Command line

4. Partnerships
Form learning pairs, someone different from your partner last week.

5. Task Analysis What did you do to find the western end of US 30?
Explain your strategy to your partner in enough detail so that your partner can explain it to the class.
Have the explanation take on an algorithmic flavor

6. Interface Examples
Focus on battery operated devices on last week’s list.
Remote car lock control
Watch
Cell phone
IPod
Calculator
PDA
Laptop computer
Secure ID generator
Wireless mouse

7. Interface Models (2) Look at: Physical interface
Operations of physical interface
Task set
Error cost

8. Notation
How should we describe interactions with (or actions taken with) the interface devices?
What are the components of these devices?
What are these actions?

9. MTF Chapter 2: Design as Applied Perception
Join up with your partner
What are the design principles included in the chapter? (Come to an agreement on the list.)
What are examples of the design principles in action? Or violations of them in action? (Choose your best example for each design principle.)

10. Design Principles
Make a symbol distinctive from those around it by enhancing a particular attribute of the symbol. (MTF p.15)
Make colors of widgets coincide with the visual processing model for ubiquitous displays. (MTF p.26)
Facilitate pattern perception by using symmetry, continuity and proximity.
Make 3-D patterns easier to perceive by using geons rather than charts.
Always display detail with luminance contrast. (MTF p.14)

11. Design Principles (2)
Make interface interactions similar to real-world interactions.
Use attractive meaningful symbols.
Use grey-scale (color intensity) to show increasing value.
Limit the amount of information shown in one area.

12. Chapter 2 Concepts

13. Perceptual Models
Information psychophysics—seeing simple information patterns
Paths in graphs
Groups of symbols
Three-stage model of visual system
Preattentive processing theory
Theory of structured object perception (Biederman)

14. Evidence for Perceptual Models
How are the models implemented in common systems?

15. HCI Research Research project description
Look at MacKenzie, Kauppinen, Silfverberg
Look at Oniszczak and MacKenzie

16. Next time Read Carroll, Chapter 3
Using the CMap tool, create a concept map for Chapter 3
Choose research project team and topic area. Report these to the instructor by Tuesday, September 5 at noon.