Ratings for “I want marijuana” on the SE-VAS as a function of number of active puffs (0 mm = not at all; 100 mm = extremely). Data are presented as average group values for all post-smoking time points (± SEM). Active marijuana decreased subjective ratings (0 puffs > 2, 4, or 6 puffs, p ≤ .05), a moderate dose-dependent effect (2 > 4 puffs, p ≤.05; 2 > 6 puffs, p ≤ .01) was observed. Differences from the 0-puff condition are indicated as follows: *
p ≤ .05; **
p ≤ .01; ***
p ≤ .001.