Fig. 2.

Age-related changes in left and right amygdala volume. The horizontal line at the center of each box represents the median, and the upper and lower boundaries of each box represent the 75th and 25th percentiles, respectively. The whiskers represent the minimum and maximum, except when the maximum value is more than 1.5 times the interquartile range beyond the 75th percentile. These data points are represented as outliers. There was a significant effect of age on both left and right amygdala volume even after controlling for total gray matter. Both groups of children had significantly smaller left and right amygdala volumes than adults, but there was no significant difference between the four-and six-year-olds.