Table 1:

Mean Scores for Parenting Practices and Marijuana Attitudes by Facebook Group Status

	Total (n = 85)		FB group (n = 55)		Materials only (n = 30)		Change from baseline
Item/Scale	Baseline	6-month follow-up	Baseline	6-month follow-up	Baseline	6-month follow-up	Total	FB vs. Materials-only
Bonding
How close is your relationship with your child?a	3.31	3.28	3.38	3.31	3.17	3.23	F = 0.02	F = 0.93
How well do you get along with your child?b	2.72	2.75	2.76	2.78	2.67	2.70	F = 0.21	F = 0.02
How often does your child share thoughts and feelings with you?c	3.96	4.01	4.05	4.04	3.80	3.97	F = 0.64	F = 1.00
Monitoring
When your child is away from home, how often do you know where he/she is?c	3.46	3.46	3.55	3.49	3.30	3.40	F = 0.08	F = 0.93
When your child is away from home, how often do you know who he/she is with?c	3.89	3.88	3.95	3.89	3.80	3.87	F = 0.02	F = 1.86
Family conflict
Conflict scaled	1.94	1.84	1.89	1.84	2.02	1.85	F = 7.28**	F = 2.30
Rewards
Rewards scalec	3.17	3.18	3.24	3.18	3.05	3.18	F = 0.51	F = 3.81+
Rules
Number of rules in the familye	12.18	12.63	12.27	12.64	12.03	12.63	F = 4.13*	F = 0.25
Consistent discipline
Discipline scalec	3.98	4.03	4.02	4.06	3.89	3.96	F = 1.44	F = 0.10
Attitudes about marijuana
Ok for teens to use marijuanad	1.21	1.14	1.18	1.13	1.27	1.17	F = 1.79	F = 0.16
Teen marijuana use is not harmfuld	1.39	1.32	1.27	1.29	1.60	1.37	F = 1.28	F = 1.75
Knowledge of marijuana law
Number of correct answersf	2.13	2.19	2.07	2.25	2.25	2.07	F = 0.10	F = 2.86

Note: N = 85 reflects those of the original sample (n = 103) who completed the 6-month follow-up survey.

⁺p < .10,

^*p < .05.

Response options:

^aExtremely close (4) Quite close (3) Somewhat close (2) Not close (1);

^bVery well (3) Moderately well (2) Not well at all (1);

^cVery often (5) Fairly often (4) Sometimes (3) Rarely (2) Never (1);

^dStrongly agree (4) Agree (3) Disagree (2) Strongly disagree (1);

^eSum of rules in the family (0–14);

^fSum of correct answers (0–3).