Table 2.

Results of Hierarchical Regression Predicting Changes in Smoking as Indicated by Expired Carbon Monoxide (CO), From Self-Report Measures Alone (Intentions, Self-Efficacy, Ability to Relate to Ads), and Then Combining Self-Report Measures With Neural Activity in an A Priori Defined Region of Medial Prefrontal Cortex

Step	R	R2	df error	F	Significant model	R2 change	F change	Significant F change
1: Self-report	.382	.146	25	2.14	.138
2: Self-report and neural activity	.592	.351	24	4.32	.014	.204	7.554	0.011