Illustration of MSIT-IAPS task trials, which consist of the Multisource Interference Task (MSIT) overlaid on images from the International Affective Picture Scale (IAPS). A) Example of a negatively valenced “Non-Interference” trial. The target number “2” is in the same position as the second finger on the number pad. B) Example of a positively valenced “Interference” trial. The target number “2” is in a different position than the second finger on the number pad. In the “Interference” trial, the prepotent response to press the first finger (matching the position of the target number) is inhibited in order to make the correct selection with the second finger. Trials not shown are “Positive Non-Interference,” “Neutral Non-Interference,” “Negative Interference,” “Neutral Interference.”