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. Author manuscript; available in PMC: 2011 Oct 22.
Published in final edited form as: Exp Clin Psychopharmacol. 2010 Jun;18(3):214–220. doi: 10.1037/a0019635

Figure 11.

Figure 11

Frequency of drug use in a social context as a function of drug type.

1 Frequency of use was measured as follows: 0 (never), 1 (one time), 2 (monthly or less), 3 (2–4 times a month), 4 (2–3 times a week), and 5 (4 or more times a week).