ROI analysis of frontal cortex areas and calcarine sulcus (N = 20 in experiment 1; N = 19 in experiment 2).

<p>Bar graphs: The ordinates show the regression-coefficients with standard errors for each ROI. The abscissa indictates the direction of the attention shifts (SL: Shift to the left; SR: Shift to the right), respective the used finger for the button presses (Idx: Index Finger; Mid: Middle Finger), and the hemisphere (LH: left hemisphere, RH: right hemisphere). Each line belongs to one ROI, which is shown in the right-most column. Main effects of hemisphere or condition are indicated with '*', interactions of hemisphere * condition are indicated with 'X'. Differences between activation for attention shifts (AS) and motor task (MT) are indicated by '>'. The significance levels are indicated as p<0.005 (*, X, >).