Ragu: A Free Tool for the Analysis of EEG and MEG Event-Related Scalp Field Data Using Global Randomization Statistics
Display of the results of the analysis of the sample dataset when subjects were divided into two groups with low and high language improvement. The left-most row of line graphs shows the same information as the line graphs of Figure 3 (except for 2 less subjects); the additional line-graphs show all effects including the new factor group. The interaction day by group shows a significant effect around 850 ms. Because there are more than two mean maps, the MDS figure now also contains a -axis that shows the projection of the mean maps onto the second eigenvector. The MDS indicates that the day by group interaction is mainly due to the differences between days 1 and 2 in poor learners; good learners show a much smaller change. The result suggests that from day 1 to day 2, poor learners have changed in late, feedback-related processing, while good learners have maintained their initial processing strategies. The same conclusion is also deducible from the mean maps shown in the upper right part of the display.
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