Figure 1.

Eriksen flanker attention paradigm. Participants were shown a row of five arrows (duration: 2500 ms) following fixation and were asked to respond as to the direction of the middle arrow while ignoring the surrounding or flanking arrows. In the congruent condition, all five arrows pointed in the same direction. In the incongruent condition, the middle arrow pointed in the opposite direction of the surrounding arrows. The classic finding is an increase in reaction time in the incongruent relative to the congruent condition