Opioid Approach Bias Modification

The investigators will use a training version of the Approach-Avoidance Task (AAT), in which patients are asked to respond to the format of presented pictures, irrespective of the pictures' content. Pushing a presented picture away will decrease picture size, whereas pulling a picture closer will increase size. There are 2 categories of pictures; 20 different opioid and 20 different non-medication alternative pain managing activities. Training effect is achieved by presenting opioid pictures in push format only and non-opioid pictures in pull format only. Two hundred training trials are presented per session.

Sham training is identical to opioid approach bias training, except pictures are presented randomly in both formats.