Figure 3
The ravages of age: every mean reaction time variable in the CNP database exhibits slowing with age. The three phenotype profiles (thick lines showing averages by age group) are consistently ordered across all variables, exhibiting a progressive increasing of reaction times with age in every task. This is an example of VISOVA, an integration of parallel coordinates plots [21] with analysis of variance: if horizontal trajectories in the diagram were removed, and made to emphasize the group averages for each variable (column), this would resemble a parallel ANOVA display. However VISOVA also selects a variable ordering so that highly-correlated variables are clustered together.