Figure 3.

Changes of performance accuracy during training. Left panel: block-by-block changes of performance accuracy (averaging across subjects). The open circles represent performance accuracy during training, one for each block (16 blocks per day). The solid dots represent the performance of the middle letter recognition in the pre- and post-tests. The data for different days were plotted in different colors. Right panel: day-by-day changes (averaging across subjects and blocks). Vertical dashed lines indicate the boundaries between days. The horizontal line represents the 80% accuracy criterion. Error bars indicate standard errors.