Presentation on theme: "What do these things have in common? a mouse a touch screen a program on your Mac or PC that includes a trashcan, icons of disk drives, and folders pull-down."— Presentation transcript:
What do these things have in common? a mouse a touch screen a program on your Mac or PC that includes a trashcan, icons of disk drives, and folders pull-down menus atm machine key pad
Human-Computer Interface design which were designed to make it easier to accomplish things with a computer. Often referred to as “CHI” or “CHI Factors”
"User interface design is not guesswork." Allan Cooper in About Face
“Do not design while you are coding.” Allan Cooper in About Face
Interface Design Rules Strive for Consistency interface should be consistent syntax, actions, layout, etc. should have a consistent format.
Interface Design Rules Give users shortcuts bookmarking navigational jumps Offer informative feedback Actions/inputs performed by the user should result in some sort of feedback.
Interface Design Rules Design dialogues to yield closure Actions sequences should have a definite beginning, middle and end. Offer simple error handling Design so that user cannot make serious errors from misuse or misinterpretation Keep error messages simple.
Interface Design Rules Forgiveness and reversal actions should be reversible. Support user-centered interaction Users should perceive themselves as the initiators of actions not as passive responders.
Interface Design Rules Reduce short-term memory load on user Displays of information should be designed to reduce demands on user. Navigation should be easy to learn and use Apply the Rule of 7
Interface Design Rules Rule of 7 short-term memory is limited in the number of things that can be contained a person can remember 7 (+ or - 2) "items" in short-term memory on average people remember between 5 and 9 things at one time your phone number is 7 digits long
Interface Design Rules Chunking try to decrease the number of items you are demanding of the user