. Author manuscript; available in PMC: 2016 Mar 1.

Published in final edited form as: Addict Biol. 2013 Dec 13;20(2):377–389. doi: 10.1111/adb.12118

Table 3.

Path coefficients from separate mediation analyses characterizing the relations between externalizing tendencies (X), error rates (Y), and error-related brain activity (M).

region	PATH

	a X-M	b M-Y	c X-Y (total)	c′ direct	ab indirect
insula/IFG (R)^{a, b}	−0.6 (0.2)^**	−34.0 (9.4)^**	29.2 (11.0)^*	9.6 (10.3)	7.0, 36.4
dACC/pre-SMA (B)^{a, b}	−0.7 (0.2)^*	−21.1 (9.1)^*	29.2 (11.0)^*	15.2 (11.7)	2.7, 30.3
inferior Parietal Lobe (R)^†	−0.6 (0.2)^*	−17.5(10.9)	29.2(11.0)^*	19.25 (12.2)	−2.0, 28.9

Note. For paths a, b, c, and c′, values are reported as unstandardized path coefficients (standard error). For the ab path values reported are the upper and lower bounds of the bootstrapped 95% confidence interval (CI95%). See Figure 2 for a schematic representation of these mediation analyses.

p < 0.05,

^**

p < 0.01.