Evaluation of interface usability in terms of functionality and ease of use remains a challenging task. This paper presents a study on evaluation techniques using two measures: the eye fixation and the hand action. The eye fixation reflects the operator’s cognitive processes, while the hand action reflects the operator’s physical action or doing. Combination of these two kinds of measures may provide an important measuring technique to give more detailed information about the uses of the information displayed. Two different interfaces for the same task are used to show the sensitivity of this combination.
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