. Author manuscript; available in PMC: 2009 Jan 19.

Published in final edited form as: Psychol Addict Behav. 2008 Dec;22(4):563–569. doi: 10.1037/a0013020

Table 1.

Means and Standard Deviations in Participants’ Responses (N = 1,344) for Items in Year 1 (Y1) and Year 2 (Y2)

	Y1 Nonuser → Y2 Nonuser				Y1 Nonuser → Y2 User
	Y1 Nonuser		Y2 Nonuser		Y1 Nonuser		Y2 User
Item	M	SD	M	SD	M	SD	M	SD
Intentions	1.06	0.26	1.14	0.35	1.29	0.42	2.01	0.84
Damage my brain^a	1.72	1.15	1.71	1.16	1.93	1.22	2.5	1.26
Lose my friends’ respect^a	1.97	1.25	2.12	1.32	2.67	1.43	3.68	1.21
Have a good time with my friends	2.14	1.34	2.26	1.32	2.79	1.34	3.62	1.30
Be more creative and imaginative	1.76	1.19	1.85	1.13	2.22	1.33	2.74	1.29
Be acting against my moral beliefs^a	1.72	1.10	1.67	1.09	1.90	1.05	2.65	1.37
Mess up my life^a	1.57	1.08	1.64	1.08	2.06	1.23	2.57	1.36
Do worse in school^a	1.55	1.01	1.64	1.06	1.94	1.13	2.68	1.38
Lose my ambition^a	1.82	1.07	1.87	1.11	2.13	1.13	2.98	1.43

Reversed so that higher score represents perceiving marijuana as less harmful.