FIGURE 1.

Affect data from two mother–infant dyads participating in a face-to-face free play session at 3 months of age. The x-axis shows time (in seconds) and the y-axis distinguishes different dimensions of affect. Maternal affect is represented in three rows at the top (A), infant affect is represented in three lower rows (B). For both mothers and infants, the highest of the three rows (in blue) represent positive affect, the middle row (in black) represents neutral affect, and the bottom row (in red) represents negative affect.