Table 2.

Descriptive statistics for infant and mother affect and dyadic behavioral synchrony in each episode of the FFSF

	Normal Play		Still-Face		Reunion
	N	M (SD)	N	M (SD)	N	M (SD)
Infant % Positive	126	.27 (.23)	123	.06 (.13)	116	.23 (.24)
Infant % Negative	126	.16 (.24)	123	.36 (.36)	116	.25 (.32)
Mother % Positive	125	.84 (.16)			115	.78 (.21)
Mother % Negative	125	.01 (.05)			115	.03 (.10)
Behavioral Synchrony	122	.20 (.19)			107	.20 (.16)

Note. % Positive and % Negative refer to the percentage of valid time infants or mothers spent displaying positive or negative affect. Mother behavior was not coded during the still-face episode, when mothers are instructed to pose a still-face.