. Author manuscript; available in PMC: 2021 Dec 1.

Published in final edited form as: Psychophysiology. 2020 Oct 13;57(12):e13673. doi: 10.1111/psyp.13673

Table 3.

Significance (p) values for comparisons between play episode versus still-face and reunion episodes for infants completing one versus two still-face trials

	Still-face 1 (SF1)	Reunion 1 (R1)	Still-face 2 (SF2)	Reunion 2 (R2)
RR-Interval
Two SFP trials	<.001	<.001	<.001	.020
One SFP trial	<.001	<.001
TWA
Two SFP trials	.137	.003	<.001	<.001
One SFP trial	<.001	<.001
lnRSA/V_Tc
Two SFP trials	<.001	.267	<.001	.025
One SFP trial	<.001	<.001
lnRSA
Two SFP trials	.005	.014	.006	.661
One SFP trial	.003	.042
T_TOT
Two SFP trials	<.001	.007	<.001	<.001
One SFP trial	.043	<.001
V_T
Two SFP trials	.005	.500	<.001	.006
One SFP trial	<.001	<.001
V’_E
Two SFP trials	.266	.861	.358	.155
One SFP trial	<.001	<.001
Physical activity
Two SFP trials	<.001	<.001	<.001	<.001
One SFP trial	<.001	<.001
Negative affect
Two SFP trials	<.001	<.001	<.001	<.001
One SFP trial	<.001	<.001
Positive affect
Two SFP trials	<.001	<.001	<.001	<.001
One SFP trial	<.001	<.001

Abbreviations: see Table 2.

Note: Entry “<.001” means p<.001. t-statistics ranged from t=0.18 to 26.25. Degrees of freedom for the t-statistics were calculated using the conservative Satterthwaite approximation, which estimates different dfs for every t-statistics. Those dfs ranged from df=192 to 518.