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Norman's model of user experience, abowd & beale's interaction framework, and ergonomics in human-computer interaction. Norman's model discusses the gulfs of execution and evaluation, human error, and fixing mistakes. Abowd & beale's framework presents their four-part interaction model and its importance in understanding interaction. Ergonomics is introduced as the study of physical interaction aspects, with examples of industrial interfaces and indirect manipulation.
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user’s formulation of actions
user’s expectation of changed system state
Human error - slips and mistakes
slip
mistake
Fixing things?
slip – better interface design mistake – better understanding of system
user intentions → translated into actions at the interface → translated into alterations of system state → reflected in the output display → interpreted by the user
e.g. controls grouped according to function or frequency of use, or sequentially
e.g. seating arrangements adaptable to cope with all sizes of user
e.g. physical position, environmental conditions (temperature, humidity), lighting, noise,
e.g. use of red for warning, green for okay, awareness of colour-blindness etc.
system
interface plant
immediate feedback instruments
