Table 2.

Outcomes for effect of UCS variations on SCR conditioning (n = 135)

Outcomes	Factor 1: Single UCS vs. Compound UCS^a		Factor 2: Short Shock vs Long Shock^a
	Single UCS (n = 70)	Compound UCS (n = 65)	Short Shock (n = 69)	Long Shock (n = 66)
Primary Outcome
Acquired Differential SCR (%, n)	34%, n = 24	62%, n = 40^**	51%, n = 35	44%, n = 29
Secondary Outcomes
Differential SCR {Mean(SE) μS}^b	0.11(0.03)	0.18(0.03)^*^c	0.16(0.03)	0.13(0.03)^c
• SCR to CS+ {Mean(SE) μS}^b	0.53(0.04)	0.70(0.04)^***	0.68(0.04)	0.55(0.04)^**
• SCR to CS− {Mean(SE) μS}^b	0.42(0.03)	0.52(0.03)^*^c	0.52(0.03)	0.42(0.03)^*^c
Unconditioned SCR {Mean(SE) μS}^b	1.42(0.07)	1.62(0.08)^t	1.47(0.07)	1.57(0.08)

Note.

There were no significant interactions between Factor 1 and Factor 2;

Means and standard errors are based on factorial ANOVA estimated marginal means covarying for race;

Significance is based on Mann-Whitney U test.

p = .06

p < .05

^**

p < .01

^***

p < .001