•Behavioural models is another fundamental principle of HCI and is all about predicting possible impacts of systems or interfaces. It is also about the reaction time of a person using a GUI.
• A Key stroke module is used to determine how long it takes to do a simple task.
•Throughput is the amount of work that can be preformed by a system component in a given amount of time.
•Fitts’ law is where someone can predict how long it would take to rapidly move from the starting position to the final area.
•There is no average user we are all different with different skills. The age of someone can cause a problem because as people age they become slower and can’t do things as fast. The cultural differences can cause a problem because people will use things differently.
•Guiard’s module of bimanual skill is all about having something for right and left handed people.
•The Key-Action Module is all about how quickly people can press a key on the keyboard.
•Buxton’s three state module is all about different ways the mouse is used on a computer.
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