Table 1.

Means, standard deviations, and correlations between key study variables.

	1.	2.	3.	4.	5.	6.	7.	8.	9.	10.	11.
1. Grade 9 Marijuana	1.00
2. Grade 10 Marijuana	0.50**	1.00
3. Grade 11 Marijuana	0.32**	0.72**	1.00
4. Grade 12 Marijuana	-0.03	0.44**	0.58**	1.00
5. Grade 8 BSSS	0.09	0.03	0.18	0.35**	1.00
6. Grade 8 EIS	0.06	0.13	0.20	0.33**	0.40**	1.00
7. Grade 8 BART-Y Explosions	0.01	0.04	0.10	0.32**	0.08	0.04	1.00
8. Ethnicity	-0.15*	0.04	0.08	0.06	0.10	-0.01	0.24**	1.00
9. Age	0.13	0.17*	0.23*	0.14	0.07	0.05	0.03	-0.10	1.00
10. Maternal Education	-0.11	-0.05	0.07	-0.01	0.03	-0.07	0.13	0.30**	-0.06	1.00
11. Sex	0.19**	0.15	0.07	0.05	-0.01	-0.08	0.02	0.04	0.08	-0.05	1.00
M (SD)	0.27 (0.84)	0.54 (1.13)	0.86 (1.30)	0.89 (1.35)	15.14 (5.21)	8.58 (4.36)	10.27 (4.31)	0.49 (0.50)	13.12 (0.56)	5.46 (1.64)	0.56 (.50)

Note. Marijuana use variables are un-transformed for interpretability; BSSS, Brief Sensation Seeking Scale; EIS, Eysenck Impulsivity Scale; White is coded 1 = white, 0 = non-white; Sex is coded 0 = female, 1 = male.

^*p < .05,

^**p < .01.