The bias retraining protocol will then utilize the AAT. Participants will again be instructed to push or pull the joystick dependent upon whether the picture is in portrait or landscape formant. For participants in the experimental condition, all drug-related pictures will be in landscape format, that is, all participants in the experimental condition will push the joystick to shrink the drug-related pictures. For participants in the control condition, drug-related pictures will be presented equally in portrait and landscape format. During training, participants have to correct all errors. Training sessions will entail 200 trials with a short break at the halfway point. Each session takes about 15 minutes to complete.