Figure 3.
Length of the mean delay per session for Group 1 mice from 9 to 24 months of age. Each data point represents the mean ± S.E. There was not a significant overall effect between the two lines (F(1,15)=2.093, p>0.05), nor was there a significant effect between the months (F(1,15)=0.842, p>0.05); there was a significant interaction between line and month (F(1,15)=2.214, p<0.05). A significant difference (p<0.05) between the two lines on specific months is indicated by *. The values for the n in the legend indicate the number of animals included in the data points at 9 months of age before the arrow, and the number of animals included in the data points at 24 months of age after the arrow.