Fig. 1.

The gambling task: partial feedback condition. On each trial, the participant is presented with two gambles (screen 1). The participant chooses one (screen 2). Once the participant has made a choice, the arrow spins round on the chosen gamble until it comes to rest on the obtained outcome (screen 3). Finally, the participant indicates his emotional response to the outcome on a continuous scale from −50 (I feel very negative) to +50 (I feel very positive). In the complete feedback condition, the arrows spin round on both wheels although the participant only receives the amount indicated on the chosen wheel.