Fig. 2. Adult mice with a higher rank showed better memory performance.

a Exploration time to familiar and novel objects in adult mice with different social ranks in the 1-hour NOR test (Wilcoxon signed-rank test, n = 12 cages). b Discrimination index in the 1-hour NOR test between 1^st- and 4^th-rank adult mice (Wilcoxon signed-rank test, n = 12 pairs). c The correlation between social ranks of adult mice and the discrimination index in the 1-hour NOR test (Spearman correlation, n = 12 cages). d Exploration time to familiar and novel objects in adult mice with different social ranks in the 24-hour NOR test (Wilcoxon signed-rank test, n = 12 cages). e Discrimination index in the 24-hour NOR test between 1^st- and 4^th-rank adult mice (Wilcoxon signed-rank test, n = 12 pairs). f The correlation between social ranks of adult mice and the discrimination index in the 24-hour NOR test (Spearman correlation, n = 12 cages). g The spontaneous alternation rate between 1^st- and 4^th-rank adult mice in the Y maze (Wilcoxon signed-rank test, n = 12 pairs). h The correlation between social ranks of adult mice and the spontaneous alternation rate in the Y maze (Spearman correlation, n = 12 cages). The boxplots show the minimum, 25th percentile, median, 75th percentile, and maximum values. Error bars = SEM.