Table 2.

Means and Standard Deviations of Infant Responses to Still-Face Paradigm

	Play	Still-Facea	Reunionb
HR	135.9 (11.5)	147.0 (12.4)#	145.3 (10.7)#
VT	85.4 (25.2)	102.3 (24.0)#	104.7 (34.2)#
V’min	4526.5 (1480.8)	5065.0 (1362.7)**	5425.9 (1846.6)#
TI	0.60 (0.07)	0.64 (.05)*	0.61 (0.05)
TE	0.68 (0.11)	0.77 (0.10)#	0.72 (0.13)
TTOT	1.28 (0.16)	1.41 (0.13)#	1.32 (.16)
TI/TTOT	0.48 (0.02)	0.47 (.02)	0.47 (.03)
PhRIB	27.3 (7.1)	33.7 (6.4)#	30.0 (7.5)
PhREB	26.9 (7.1)	34.4 (6.1)#	29.1 (6.3)
%RC	36.1 (9.3)	40.0 (10.4)+	40.5 (14.2)*
Behavioral Distress	0.78 (.90)	2.09 (1.20)#	1.83 (1.53)#

^aSignificance level for difference in infant response between Still-Face and Play episodes.

^bSignificance level for difference in infant response between Reunion and Play episodes.

⁺p<.10.

^*p<.05.

^**p <.01.

^#p <.001.