Participant earnings were displayed numerically on the screen, centered just below the middle two balloons. There were four blocks of trials with approximately 30 trials in each block. After each block, a clear glass coin jar appeared to reflect the cumulative winnings to that point. Realistic dime images appeared in the jar, one by one, each followed by a coin sound. Prior to beginning the game, there were 3 practice trials, which introduced the coin jar. A total of 120 trials (60 per condition) were administered for the purpose of computing ERPs. Three additional trials were added such that the total winnings were $6.30 for each participant. Participants received this payment as part of a larger compensation ($60), for a study on stress and decision making.
