Statistical intra-group analysis of three different 6-day interval data of all three animal groups. A Median discrimination performance with interquartile range for C, LR and RL groups with results of the Friedman ANOVAs over all intervals and Bonferroni corrected Wilcoxon tests (tests between two intervals). Only group RL shows a significant loss of DP after the second lesion. B Mean d’ values and standard deviations of the three groups over the three 6-day time intervals. These analyses generally confirmed the results of the DP analysis shown above. C Median CR+ and CR- responses during the 6-day intervals. Note the significant increase of CR+ and CR- over time in both lesion groups, but not in control group C. D Median inter-trial crossing activity. Animals of all groups show an increase of activity in the course of the experiment, but this was more pronounced in the lesioned groups compared to the control group, especially after the second lesion.