Participants
The study was approved by the local ethics committee. 20 right-handed volunteers participated in this study (10 females and 10 males; mean age: 24 years, SD = 3.1 years, range 19 – 32 years). They were paid 6 Euro per hour for participation and could earn an extra bonus depending on their success of gambling. Every participant gave written informed consent for participation after receiving verbal and written information about the purpose and course of the experiment and after examination by a physician whether any risk would not allow the MRI application. Following the MRI recording, participants completed several questionnaires (see below). For every participant, a log-file recorded during the time points when a trial started and the latency of choosing an option. Based on this information, the first-level analyses of imaging data were conducted, as described below. In addition, log-files of all three risk levels included information on the decisions of participants and their choice of riskier or less riskier options.