Tog's Principles Flashcards
List all tog’s principles
A3C2D2E2 F1H1L2M1 P1R1S1T1V1
3222 1121 ‘11111
ACDE FHLM PRSTV
Aesthetics
Aesthetics should never trump usability.
Anticipation
Anticipate the user’s needs.
Autonomy
Give control to the user
Colour
Color blindness. Color as vital interface element.
Consistency
Mainly, consistency with the user expectations.
Defaults
Easy to change, selected
Discoverability
If the user cannot find, it does not exist
Efficiency of the User
Focus on the user productivity, not the computer’s
Quicker? Warm water in the microwave for 1 m e 10s or 1m e11s?
Keyword should come first on buttons labels and menus.
Explorable interfaces
“Give users well marked roads and landmarks, then let them shift to
four-wheels drive”
Reversible actions – “Undo”
Fitts’ law
Big buttons are faster
Human-Interface Objects
Consistent, stable, self-meaningful
Ex: directories, files, recycle bin
Latency Reduction
Multi-tasking
Visual and audio feedback from buttons in 50 ms
½ -2s display hourglass, animated hourglass
Progress bar, sign operations end (beep)
Messages indicating the system’s actions
Trap multiple clicks of the same button or object
Learnability
Ideal: no learning curve
Metaphors
Chose metaphor that allow an instantaneous understanding of the
conceptual model.
Create images in the user’s mind.
