ch16_UI - User interface design Objectives To suggest some...

Info iconThis preview shows pages 1–11. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: User interface design Objectives To suggest some general design principles for user interface design To explain different interaction styles and their use To explain when to use graphical and textual information presentation To explain the principal activities in the user interface design process To introduce usability attributes and approaches to system evaluation Topics covered Design issues The user interface design process User analysis User interface prototyping Interface evaluation Interface Design Easy to use? Easy to understand? Easy to learn? Interface Design lack of consistency too much memorization no guidance / help no context sensitivity poor response unfriendly Typical Design Errors Golden Rules 1. Place the user in control 2. Reduce the user’s memory load 3. Make the interface consistent The user interface User interfaces should be designed to match the skills, experience and expectations of its anticipated users. System users often judge a system by its interface rather than its functionality. A poorly designed interface can cause a user to make catastrophic errors. Poor user interface design is the reason why so many software systems are never used. Human factors in interface design Limited short-term memory – People can instantaneously remember about 7 items of information. If you present more than this, they are more liable to make mistakes. People make mistakes – When people make mistakes and systems go wrong, inappropriate alarms and messages can increase stress and hence the likelihood of more mistakes. People are different – People have a wide range of physical capabilities. Designers should not just design for their own capabilities. People have different interaction preferences – Some like pictures, some like text. UI design principles UI design must take account of the needs, experience and capabilities of the system users. Designers should be aware of people’s physical and mental limitations (e.g. limited short-term memory) and should recognise that people make mistakes. UI design principles underlie interface designs although not all principles are applicable to all designs. User interface design principles Principle Description User familiarity The interface should use terms and concepts which are drawn from the experience of the people who will make most use of the system. Consistency The interface should be consistent in that, wherever possible, comparable operations should be activated in the same way. Minimal surprise Users should never be surprised by the behaviour of a system. Recoverability The interface should include mechanisms to allow users to recover from errors....
View Full Document

This note was uploaded on 07/07/2011 for the course CS 430 taught by Professor Kapoor during the Summer '08 term at Illinois Tech.

Page1 / 50

ch16_UI - User interface design Objectives To suggest some...

This preview shows document pages 1 - 11. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online