Abstract
Aiming at the demand of cognitive load measurement in the human-computer interaction, the influence of different cognitive load levels on the EEG signals is studied. By designing the human-computer interaction experiment, this study investigates the effects of 3 kinds of cognitive load levels (Low, Medium and High) on EEG signals caused by 3 different factors(task complexity, time pressure and disturbance). The results indicate that there are significant differences about EEG activity on different cognitive workload levels, while Theta and Alpha waves are more sensitive to changes in cognitive load. It is also found that the EEG activities on different levels of cognitive load caused by 3 different factors have similarities and differences, the change of cognitive load caused by environmental disturbance is obviously different from that of the other 2 factors. The results have reference value for the design and development of new interactive technologies such as intelligent human-computer interface.
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