Discussion Question Set #9

As you study this week's material, please ponder the following discussion questions. Post your responses in the appropriate threads in WebCT.

1. What is the difference between formative and summative evaluation?

2. Summarize the four alternative evaluation paradigms. What are their key differences? When would you want to use each?

3. What is the "Model Human Processor," and what role does it play in GOMS and the Keystroke Level Model?

4. What are the key differences between GOMS and the Keystroke Level Model? Illustrate with a specific example.

5. Where do the specific operator times used in the Keystroke Level Model come from?

6. What are the key advantages and disadvantages of user modeling techniques, as compared to usability testing?