1. Do not want to be interrupted
2. Focused is the intensive task
3. Be fitted to all ages
1.2 The historical Shift in the design of the interface
1.3 The process of the interface design
- Learnability: How easy is it for users to accomplish basic tasks the first time they encounter the interface?
- Efficiency: How quickly can users accomplish their tasks after they learn how to use the interface?
- Memorability: After a period of non-use, how long does it take users to reestablish proficiency?
- Errors: How many errors do users make, how severe are these errors, and how easy is it for users to recover from these errors?
- Satisfaction: How pleasant or satisfying is it to use the interface
After a design is testing well in discount or informal studies, formal experiments comparing different designs and measuring for statistically significant differences can be conducted.
1.4 The guidelines for the Design
- Offer informative feedback.
- Support user control.
- Reduce short-term memory load.
- Provide shortcuts for skilled users.
- Reduce errors; offer simple error handling.
- Strive for consistency.
- Permit easy reversal of actions.
- Design for closure.
1.5 Offer Efficient and Informative Feedback
Show Search Result Immediately
Show Informative Documents immediately
Allow Sorting of Results By Criteria
Show Query Term Suggestions
Use Relevant Indicators Sparsely
Support Rapid Response
- Offer efficient and informative feedback,
- Balance user control with automated actions,
- Reduce short-term memory load,
- Provide shortcuts,
- Reduce errors,
- Recognize the importance of small details, and
- Recognize the importance of aesthetics.