Figure 1.

(Top portion) Two dyads’ daily reports of happiness mapped in order of their occurrence onto state space grids. The x-axis represents female’s happiness, and the y-axis represents the male’s happiness. The upper state space grid (Dyad A) represents a couple that has unstable levels of happiness, whereas the lower state space grid (Dyad B) represents a couple in which both members are happy. (Bottom portion) Extracted sequences from Dyads A, B, and C (not pictured above). The distance metric used is the optimal-matched-based “cost” of transforming one sequence into the other, with greater distance indicating more dissimilarity between dyads.