Fig. 3.

Behavioral performance of subjects in the experimental group. (A) In the pretraining color search condition, a highly significant category effect was found, with between-category RTs faster than within-category RTs (455 ms vs. 476 ms). There was no significant effect of visual field (468 ms vs. 462 ms). Crucially, the interaction of the two variables was significant, with RVF between-category RTs being the shortest. (B) Training effects for within-category colors at the pretraining phase, which became between-category colors after training. Before training, there is no reliable VF difference for within-category targets. After training, former within-category pairs that have become between-category pairs are now identified faster in the RVF than in the LVF. (C) Training effects for between-category colors at both pre- and posttraining phases. Between-category targets are identified faster in RVF than in LVF both before and after training. Error bars indicate SEM. Asterisk (*) indicates a significant response difference at P < 0.05.