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Models II HCI (Keystroke-Level-Model(KLM) (only operators on keystroke…
Models II HCI
Keystroke-Level-Model(KLM)
only operators on keystroke-level
can help to compare UI designs and interaction methods
shortcuts
Levels of detail in Models
Concrete
mark word, type word
Keystroke-Level
press shift, delete key, mouseklick
Abstract
correct/wrong spelling
strengths of GOMS
quick to apply
cheap to apply
helps in decision making
Gulf of execution
How directly can the intended actions be accomplished
The difference between the intentions and the allowable actions
Do the possible system actions match the intended actions
principles of good design(Norman)
continuous feedback to the user
Interfaces should include good mappings that show the relationships between the stages
Stage and action alternatives are always visible