Table 2.

Pre-Post Means (SD) and Effect Sizes for Variables Associated with SFAS

Variable	SFAS Baseline	SFAS 1-month follow-up	Within-groups effect size (d)	Relaxation Baseline	Relaxation 1-month follow-up	Within-groups effect size (d)
Depression	7.76 (8.45)	4.84 (8.40)	.35	6.97 (6.19)	5.77 (6.86)	.19
Protective Behaviors	53.32 (12.53)	59.76 (14.18)	.48	52.73 (12.42)	54.70 (14.81)	.15
Substance-free Reinforcement	6.11 (2.08)	6.12 (2.11)	.01	5.93 (2.04)	6.05 (2.51)	.05
Evening Studying	3.32 (.74)	3.29 (.93)	−.04	2.89 (.99)	2.46 (1.07)	−.42
Consideration of Future Consequences	39.87 (7.43)	41.36 (8.24)	.19	40.00 (6.51)	39.15 (6.52)	−.13
Delayed Discounting	.040 (.050)	.036 (.040)	.08	.043 (.047)	.042 (.037)	.02

Note: Sample sizes were as follows for SFAS and Relaxation respectively: Substance-free Reinforcement: ns = 37, 38; Depression: ns = 38, 39; Delay Discounting: ns = 39, 39; Consideration of Future Consequences: ns = 39, 39; Protective behaviors: ns = 37,37; Evening studying: ns = 38, 37.