Choosing Money over Drugs: The Neural Underpinnings of Difficult Choice in Chronic Cocaine Users
Figure 1
Behavioral tasks. Participants performed two single-commodity and two cross-commodity temporal decision-making tasks. (a) During single-commodity tasks individuals made choices between immediate money or delayed money (MM) and immediate cocaine or delayed cocaine (CC). In cross-commodity tasks individuals made choices between immediate money or delayed cocaine (MC) or between immediate cocaine or delayed money (CM). (b) An example trial from the MC task. A trial consisted of a viewing period lasting for a maximum of 5 s, a submission period lasting for 1 s, and a jittered fixation screen lasting for an average of 5 s. During the viewing period immediate and delayed options appeared randomly on the left or right side of the screen under the question, “Would you rather have?” Once individuals selected the immediate or delayed commodity a box appeared around their selection for 1 s. Immediate amounts were varied 6 times for each of four future time points (1, 4, 26, and 52 weeks).
