Figure 1
The task started with a baseline measure of arousal (“How do you
feel?”) and craving (“How much are you craving cocaine at this
moment?”). Then, a total of 12 blocks were shown in random order, which
consisted of 3 emotionally negative blocks, 3 cocaine blocks, 3 control
blocks matched to the emotionally negative blocks and 3 control blocks
matched to the cocaine block. Each block consisted of 10 images (total
120 images) and were shown for 2.5 seconds. Both craving and affect were
assessed after every block.