CS 3724 Lecture Notes for Sep 6

Design Guidelines

I. Models of interaction

Foley and van Dam's Four Level Approach

• Conceptual level
• Semantic level
• Syntactic level
• Lexical level

Keystroke Level Model (KLM)

• Task acquisition
• Task execution
• Motor and mental operators

GOMS

• Goals, operators, methods, selection rules
• Using GOMS
• CCT, NGOMSL, TAG

II. Norman's Stages of Action models

Gulf of execution

Gulf of evaluation

Seven stages of action

• form goal
• form intention
• specify action
• execute action
• perceive system state
• interpret system state
• evaluate outcome