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Time frequency plots of representative left and right trials of PCP (A) and GSP (B) illustrate the numerous factors influencing the EEG signal and subject performance. The plotted colour corresponds to the AR spectral amplitude minus baseline. Black squares on the plots indicate the frequencies used for control. Words centred across the figure apply to both right and left plots. Words below a figure apply to the individual plot. Colour scale bars on the right apply to the entire row.
