The research object of this paper is the feedback in human-computer interaction (HCI) of mobile devices with touch screens. Through a contrast analysis on the models of feedback of the traditional non-touch screen mobile devices and the new ones with touch screens, the paper proposes that, to build a new effective feedback mechanism on touch screen mobile devices, enhancing visual feedback and establishing multi-channel feedback mechanism are two important design methods. Then the paper concludes several user-centered design principles in the design of feedback on touch screen mobile devices, such as simulation and metaphor, clarity, no interference, intelligent and user controllable principles, etc.
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