Description:
This graph presents an example of a multiple comparison plot. The bars with within-group pairwise comparison annotations were generated automatically by a two-way repeated-measures ANOVA, which produced paired comparison plots for each age group. The top-level annotations were added manually to indicate the overall test results for the 6–10 and 11–16 groups.
Background:
The eyesight was measured at three therapy periods (TP1–TP3) in children aged 6–10 years and 11–16 years. Within each age group, the overall difference among the three therapy periods was assessed by one-way repeated-measures (RM) ANOVA. Pairwise comparisons between individual therapy periods were derived from the simple-effects analysis of a two-way RM ANOVA (Therapy Period × Age) using Tukey method (shown as brackets within each panel).