18. Shneiderman about design

• 1. Human factors of interactive software
• 2. Theories principles guidelines
• 3. Menu selection and form filling
• 4. Command languages (less important)
• 5. Direct manipulation
• 6. Interaction devices (technical details)
• 8. System messages screen design and color
• 9. Multiple window strategies
• 12.4. Online help
• 13 Iterative design, testing evaluation

• Strive for consistency
• Enable frequent users to use shortcuts
• Offer informative feedback
• Design dialogues to yield closure (begin - middle - end)
• Offer simple error handling
• Permit easy reversal of actions
• Support internal locus of control
• Reduce short term memory load