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. Author manuscript; available in PMC: 2011 Oct 1.
Published in final edited form as: Psychopharmacology (Berl). 2010 Jul 28;212(2):193–203. doi: 10.1007/s00213-010-1942-4

Figure 3.

Figure 3

Data are shown for mean values (n=9) for expired CO2 (top left panel), Observer-Rated Opioid Agonist Adjectives (top right panel), “Does the drug have any GOOD EFFECTS?” (bottom left panel) and Street Value (bottom right panel) as a function of dose (X-axis). Brackets indicate + 1 SEM. A significant effect of Dose Condition was observed for all four measures (F9, 72 values ≥ 7.8, p < 0.0001). Filled symbols are significantly different from placebo (Tukey test; p < 0.05).