Fig. 9.

Joint plot of discrimination time/reaction time slopes obtained when the data are aligned on stimulus onset and reach onset. The abscissa indicates the slope obtained from the stimulus-onset alignment (slope_s), and the ordinate indicates the slope obtained from the reach-onset alignment (slope_r). For a given cell, if the slopes obtained from both alignments are consistent with a discrimination time that is correlated with reaction time, the cell will be plotted near the junction of slope_s = 1 and slope_r = 0 (solid green circle). On the other hand, if the slopes obtained from both alignments indicate that discrimination time occurs a consistent time after stimulus onset regardless of reaction time, the cell will be plotted near the junction of slope_s = 0 and slope_r = −1 (dotted red circle). Circles indicate SD around the mean for each category.