Fig. 6.

Classification accuracies for imagery of visual motion in four different directions. Average classification accuracies across cross-validations for all subjects (S1–S12) are shown in eight different ROIs. Error bars show one standard deviation of the accuracies' distribution across cross-validations. The black horizontal lines represent the chance level (25%); the gray horizontal lines show the 95th percentile of each 1000-fold permutation test. Asterisks in single subjects indicate significant accuracies (p < 0.05) as assessed by 1000-fold permutation testing. Asterisks in the group average indicate significant accuracies as assessed by Wilcoxon Signed-Rank tests against the average classification accuracy of 1000-fold permutation testing. Orientation wheels at the right show the directions of motion that were imagined by the respective subjects in each row. MT d: 20-fold dilated MT ROI; ma: visual motion-responsive areas ROI; ma d: 10-fold dilated visual motion-responsive areas ROI.