Figure 1.
Stimulus screen layout with an example of a right side stimulus.
All letters of the stimulus are placed equidistant from the fixation cross, equally spaced from each other.
Figure 2.
Mean reaction times (A) and accuracies (B) for each 20 min block.
Error bars represent standard errors.
Figure 3.
Interaction plot of size × relevance × congruency.
Three way interactions between size, relevance (target versus flanker manipulation) and congruency, on reaction times and response accuracies are illustrated. The solid lines with the squares represent the congruent condition and the dotted lines with the diamonds represent the incongruent condition.
Figure 4.
for incongruent stimuli (dotted lines) and decrease or remain constant for congruent stimuli (solid lines).
Note that directions of the target size manipulation condition (positive) are opposite to those of the flanker size manipulation condition (negative or neutral). From the perspective of relative target to flanker size, they would be in the same direction. Error bars represent standard errors.
Table 1.
Main and interaction effects on reaction times and accuracies.
Figure 5.
ERPs in time on task intervals.
A) ERPs of experimental blocks, averaged over electrode positions O1 and O2 contralateral to stimulus presentations. B) ERPs of experimental blocks, averaged over electrode positions O1 and O2 ipsilateral to stimulus presentations. C) ERPs of experimental blocks averaged over electrode positions P7 and P8 contralateral to stimulus presentations. D) ERPs of experimental blocks at CPz.
Table 2.
Main and interaction effect on mean ERP amplitudes on CPz in the 300–400 ms interval and on the P3b.
Figure 6.
Interaction plots of the averaged voltage at the ascending flank of the P3b at CPz.
These plots show a relatively constant difference in the ERP deflection for large versus small targets, while the ERP deflection for flankers changes from a smaller deflection for larger stimuli at the beginning to a larger deflection for the same stimuli at the end. Error bars represent standard errors.