Abstract

This paper describes a computational model of skilled use of a graphical user interface and of errors made by skilled users. The model is based of Norman's action framework and is implemented using Kintsch's construction-integration theory. The model selects actions, such as moving mouse cursor, clicking mouse button, typing letters, and so on, by integrating information from various sources. These sources include the display, task goals, expected device states, and knowledge about the interface and the application domain. We show how information about the intermediate states of a task presented on a display plays a critical role in skilled performance. The model also

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