10.1371/journal.pone.0174949.g010 Winnie K. Y. So Winnie K. Y. So Savio W. H. Wong Savio W. H. Wong Joseph N. Mak Joseph N. Mak Rosa H. M. Chan Rosa H. M. Chan T-statistic map of each task comparing high and low difficulty level. Public Library of Science 2017 EEG feature theta activity analysis window Frontal EEG signals EEG features SVM model arithmetic operation channel EEG device motor tasks workload decision task 2017-04-17 17:34:24 Figure https://plos.figshare.com/articles/figure/T-statistic_map_of_each_task_comparing_high_and_low_difficulty_level_/4881554 <p>T-statistic map of each task comparing high and low difficulty level.</p>