a statistical trendP = 0.0532
During reversal (R), 2 months old WT and TG have a learning index above the chance level of 0.5, although both groups did only reach a statistical trend (p value between 0.05 and 0.1; 2 months: WT, t = 2.126 and P = 0.0532; TG, t = 1.884, and P = 0.0805).