Graphical representation of the temperament types identified at each time as well as the stability of groups from time 1 to time 2. Nodes (colored dots) represent children; connecting edges, correlations between individuals (shorter line indicates stronger correlation). Colors of nodes are based on time 1 groupings (blue: mild; red: surgent; green: irritable). In the first half of the video, the grouping of the individuals at time 1 is displayed. After a pause, the transition to the time 2 correlations is added and the movement of individuals between groups is depicted. Both the surgent and irritable types are highly stable and remain tightly clustered, whereas the uncomplicated type is less so and disperses somewhat at time 2.