Fig. 1: Monetary incentive delay (MID) task.
From: Effects of comorbid disorders on reward processing and connectivity in adults with ADHD

Event-related functional magnetic resonance imaging (MRI): 30 control conditions (a) and 30 winning conditions (b). In sum 60 trials. A circle (a) or a smiley (b) is displayed in the anticipation phase. Then a flashlight appears and the participant has to react as fast as possible by pressing a button. After the reaction, a feedback is shown: control condition (a): feedback about the success of the reaction and winning condition (b): feedback about winning money—50 cents or a booster of 2€.