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. Author manuscript; available in PMC: 2016 Jan 11.

Published in final edited form as: Biol Psychol. 2012 Nov 2;92(2):241–248. doi: 10.1016/j.biopsycho.2012.10.009

Table 3.

Results of Hierarchical Multiple Regression Analyses Predicting Effortful Control from RSA and Shyness

	Demographics			Main Effects			Interaction

	b	t		b	t		b	t

Intercept	−0.13			−0.14			−0.12
Age	0.73	5.46	^***	0.67	5.04	^***	0.70	5.33	^***
Female	0.41	2.41	^*	0.44	2.58	^*	0.43	2.60	^**
RSA				3.74	2.01	^*	3.03	1.64
Shyness				−0.07	−0.86		−0.08	−0.97
RSA × Shyness							4.45	2.35	^*

r ²	0.25			0.29			0.34

Change in Model Fit	D_m = 16.29, p < .001			D_m = 2.51, p = .082			D_m = 5.32, p = .019

Note.

^*

p < .05

^**

p < .01

^***

p < .001.