Effectiveness of a marijuana expectancy manipulation: Piloting the balanced-placebo design for marijuana. Experimental and clinical psychopharmacology

Metrik, J., Rohsenow, D. J., Monti, P. M., McGeary, J., Cook, T. A., de Wit, H., ... & Kahler, C. W. (2009). Effectiveness of a marijuana expectancy manipulation: Piloting the balanced-placebo design for marijuana. Experimental and clinical psychopharmacology17(4), 217.