Comparison and Analysis of Cognitive Load under 2D/3D Visual Stimuli
With the increasing prevalence of 3D videos, understanding the distinctions between 2D and 3D video experiences has become significantly important. In our study, we explored the cognitive load imposed by 2D and 3D video stimuli under various cognitive tasks using electroencephalogram (EEG) data. To assess the cognitive load, we introduced the Cognitive Load Index (CLI), a measure that combines the oscillations of theta and alpha oscillations. Our experimental setup included four video stimuli, each associated with typical cognitive tasks. Participants were exposed to both 2D and 3D video stimuli, during which their EEG data were recorded. Then, we analyzed the power within the 0.5-45Hz frequency of EEG data, and CLI were used to evaluate brain activity. According to our experiments and analysis, videos requiring simple observational tasks (P < 0.05) consistently induce a higher cognitive load in participants when watching 3D videos. However, for videos that involve calculation tasks (P > 0.05), the difference in cognitive load induced by 2D and 3D stimuli is not as pronounced. Thus, we conclude that 3D videos generally induce a higher cognitive load, but the extent of this difference also depends on the content of the video stimuli.
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