HUMAN-COMPUTER NTERACTION Donald Norman 's model · Seven stages user establishes the goal formulates intention specifies actions at interface executes action perceives system state interprets system state evaluates system state with respect to goal o Norman s model concentrates on users view of the interfaceDonald Norman’s model • Seven stages – user establishes the goal – formulates intention – specifies actions at interface – executes action – perceives system state – interprets system state – evaluates system state with respect to goal • Norman’s model concentrates on user’s view of the interface