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. Author manuscript; available in PMC: 2012 Oct 22.
Published in final edited form as: Drug Alcohol Depend. 2010 Aug 8;112(3):247–250. doi: 10.1016/j.drugalcdep.2010.06.010

Figure 1.

Figure 1

Median indifference points for each of the four groups. Best fit curves were drawn through these points using Mazur’s (1987) hyperbolic decay equation. SUD = Substance Use Disorder.