methods ---> Object reversal task!!
Methods: 5 patients with lesions in OFC and 4 patients with lesions in dACC were compared to 17 healthy controls. Participants performed two computerized value-driven learning tasks, on two separate occasions, at least 2 months apart. The reinforcement structure of the two tasks was identical: one choice was associated with 6/7 wins and 1/7 loss, and another choice was associated with 6/7 losses and 1/7 win. Once subjects had selected the currently better option 13 of any 14 trials, the contingencies were reversed. The task continued for 70 trials after the initial reversal, with further reversals occurring whenever the learning criterion was met. Each choice resulted in a win or a loss of 50$ (play money). In the stimulus-value task, subjects were choosing between two decks of cards of different colors, while in the action-value task, subjects were choosing between two possible movements, supination or pronation of the wrist.