Table 2.

Results of the ANOVAs testing the effect of group on startle potentiation to P- and U-threat.

Variable	df	F	p-value
Model 1 – No Covariates
Threat Condition*	1, 155	12.41	<0.01
Group*	4, 153	5.27	<0.01
Threat Condition x Group*	4, 153	2.82	0.03
Model 2 – With Covariates
Threat Condition	1, 151	0.02	0.88
Group*	4, 151	4.30	<0.01
Sex	1, 151	<0.01	0.95
Race	1, 151	0.06	0.80
Num. of Current IPs	1, 151	1.34	0.25
Study	1, 151	0.15	0.70
Threat Condition x Group*	4, 151	2.69	0.03
Threat Condition x Sex	1, 151	0.76	0.39
Threat Condition x Race	1, 151	2.38	0.13
Threat Condition x Num. of Current IPs	1, 151	0.01	0.94
Threat Condition x Study	1, 151	3.42	0.08

Note.

^*p < .05. Threat Condition = predictable or unpredictable; Race is coded as binary variable: Caucasian relative to non-Caucasian.