a possible trendp = 0.097
In the right hippocampus, there was a main effect of income ( F (1,123.24) = 21.55, p < .001) and a possible trend for the income and quadratic age interaction ( F (1,118.07) = 2.79, p = 0.097). 3.2 Age-related changes in bilateral hippocampus by parental education Next, we tested the effects of parental education level on offspring hippocampal volume trajectories over development.