Choosing Money over Drugs: The Neural Underpinnings of Difficult Choice in Chronic Cocaine Users
Figure 3
Temporal discounting behavior. (a) Indifference amounts (mean ± SEM) at each of four future time points (1, 4, 26, and 52 weeks) in nonexclusive responders in each group for single-commodity and cross-commodity tasks. In single-commodity tasks individuals chose between immediate or delayed money (MM) or cocaine (CC). In cross-commodity tasks individuals chose between immediate money or delayed cocaine (MC) or between immediate cocaine or delayed money (CM). (b) Comparison of indifference magnitudes, measured by area under the indifference curves in each task. Larger magnitudes reflect more value placed on the future. Conversely, smaller values reflect less value placed on the future. CCUs devalued future money and cocaine more than Controls during single-commodity tasks. During cross-commodity tasks, arrows point out that while CCUs devalue delayed money more than Controls, they valued delayed money significantly more than delayed cocaine. .
