| This paper mainly studies the cognitive load of mobile terminal data visualization in data visualization interface.And oddball experiment method by using the method of focus group discussion,with some large retail ent ERP rise data visualization report,for example,starting from the basic page,then studies the cognitive load of data visualization interface on mobile phones.To explore the influence of word weight change,visual guide line,label,basic coordinate axis,graph area ratio on human brain cognition and its load relationship.Subjectively,it is to use the research method of focus group to sort out the existing and research materials and try to reach a relatively macroscopic conclusion.Objective research method is through the ERP of oddball experimental paradigm,obtain EEG data,from the P300 and N200 EEG components analysis subjects to the reaction of different interface elements,compare under different experimental conditions and electrode position electrical components of the change of amplitude and latency.The electroencephalogram data and behavioral data obtained from deep processing are summarized and the final conclusion is drawn.The experimental results show that the amplitude of N200 is positively correlated with the deviation degree of two stimulus materials in the EEG data obtained at the early stage of ERP experiment.It was found in the preparation stage of experimental materials that a large number of Arabic numerals were included in the visual interface,especially in the experimental materials of the table,which may increase the amplitude of N200.At the middle and late stage of the experiment,the P300 amplitude generated by the bias stimulus was positively correlated with the cognitive load of graphic elements.After experiments and experience summary,the area at the top left of the screen first attracted the attention of the subjects,and the processing time of graphic elements in this area was relatively short.When there are color blocks on the interface,the area of color blocks is easier to attract users' attention,the processing time here is shorter,and the cognitive resources need to be invested less than other resources.In this experiment,on the basis of data analysis to get the conclusion,to join the user's perception of control,the icon,the color,the visual page restructuring,and it is the cognitive load of comparative study,subjects in the study of ERP or EEG to complete a specific task,and the time required to record the physiological and behavioral responses,to reach appropriate behavior data.During the experiment,the six electrode positions selected in this study had no significant effect on the average amplitude and latency of P300 and N200 EEG components.Objective ERP EEG research combined with subjective cognitive analysis to the following conclusion: used to increase advertising in the chart elements,such as a zebra crossing,divider,numerical guide can effectively reduce the user's cognitive effort.Reducing the visual flow of users can also effectively reduce cognitive load.According to different software applications,it is necessary to make a specific analysis of the weight and display it in a position consistent with the center of human vision.In addition,the paper finally puts forward some opinions based on experimental results,through the adjustment of different units,convenient preliminary use the user a better understanding of new users and terminal interface shows the data content.The research results of this topic can not only be applied to ent ERP rises' visualization of report data,but also be extended to other pages.In conclusion,reasonable arrangement of information elements and control of their quantity can effectively improve the efficiency of use,prevent cognitive load overload,and improve the efficiency of work. |
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