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[Spatial and temporal characteristic of eye movement in human-computer interface design].

OBJECTIVE
To examine the related spatial and temporal characteristics of eye movement in HCI design and to provide ergonomic parameters to optimize the HCI design based on eye tracking.


METHOD
Task time, selected error and timeout numbers were recorded automatically, when 12 participants were performing the task of target selection, with different object size, space and dwell time.


RESULT
It was significantly found that task time was influenced by object size and dwell time, the selected error was influenced by object space and dwell time significantly.


CONCLUSION
The dwell time, object size and object space are all important to optimize the HCI design based on eye tracking. We recommend that the dwell time should be 500 ms, the object size and object space should be not less than 1.5 degrees and 1.0 degrees respectively for the normal interactive systems.