Skip to main content
. Author manuscript; available in PMC: 2018 Mar 1.
Published in final edited form as: Addict Biol. 2016 Jan 5;22(2):502–512. doi: 10.1111/adb.12341

Figure 1.

Figure 1

A) Schematic of reward condition of PET paradigm: Trials followed the same timing as the fMRI paradigm presented in a single run of 30 minutes with reward and loss cues. Novel changes to cues and feedback were added over time including color and sound to maintain subject interest. A control condition presenting a neutral cue and target with no feedback was presented during a separate single 30 minute run. B) Schematic of fMRI paradigm: A single trial of 6 seconds consisted of 2000 ms each for cue; anticipation; and target plus feedback. Subjects complete 2 runs of 5 minutes each. Reward, loss, and neutral cues were counterbalanced and presented pseudorandomly throughout each run.