Fig. 2

Average RT across five epochs, presented separately for trials in which the target appeared in the target-rich quadrant and trials in which the target appeared in the direction-matched target-sparse quadrant. Data is presented for all participants (top), then presented separately for participants whose target-rich quadrant was in front of them (middle) and for those whose target-rich quadrant was behind them (bottom). The rich quadrant is classified as the quadrant that the target was most likely to appear in during the training epochs 2–4. For epoch 1, the RT for the quadrant that would later become the rich quadrant is plotted as “rich,” and for epoch 5, the RT for the previously rich quadrant is plotted as “rich.” This allows for tracking of patterns of learning across changes in the probability distribution. Error bars represent ± 1 standard error of the mean