Abstract
Operating many consumer products and electronic industrial machines is difficult when a clear relationship does not exist between the user interface and the device behavior. The mental representation of the user interface for an electronic device can include knowledge of button syntax and semantics as well as an understanding of the underlying model of the electronic device. Users do not need to learn the underlying device model because the sequence of steps required to operate most electronic devices generally cannot be inferred from the engineering models. A computer-based instructional simulation of a program entry panel for a telephone system was developed to help users learn panel syntax and semantics.
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