highly significantp < 0.0000001
As shown in Figure 4 A, a one-way ANOVA with 10 levels of Dream-Age (1–10 years) as independent variable and current (log) nightmare recall as dependent variable revealed a highly significant main effect ( F 9,17004 = 6.08, p < 0.0000001) showing that earlier recalled dreams were associated with frequent current nightmares.