In other cases, however, an effective design may require teaching the user to perform an action that may seem unintuitive at first. In some early car radios, to assign a radio station to a preset button, you had to follow a series of steps. In the better designed devices, instructions appeared on the LCD display, seemingly shrinking the Gulfs of Execution and Evaluation. But the design was actually terrible, because it was so inconvenient and tedious to modify the presets, and, worse, one was tempted to do it while driving. A much better solution emerged. To assign the currently playing
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