Display of a trial in the fair-alternative condition (top: control, bottom: no-control condition).

<p>The left part of the screen shows the name of the proposer at the top (here “Proposer”) and the name of the participant underneath (here “You”). In the no-control condition, the otherwise black silhouette of the proposer was purple with a banner displaying “Computer chooses”. The same banner was also displayed instead of the proposer's name. The two potential distributions are specified by red and blue coins (red for proposer, blue for responder). The offer selected by the proposer was encircled in red. The participant has to decide whether to accept (“Yes”) or reject (“No”) the offer via button press.