to be a better representation of a true zero (Junghofer, Elbert, Tucker, & Braun, 1999). The data was baseline corrected to the 100 msec pre-stimulus interval. Finally, single trial data was averaged respectively for each condition (reward and non-reward). Participants providing at least twenty-five artifact free trials per condition were included (n = 47). Data for participants with fewer than 25 artifact free trials per condition received additional preprocessing with statistical eye-blink removal (blink threshold 14 µV/msec) (Gratton, Coles, & Donchin, 1983). Participants whose data yielded 25 good trials per condition with this additional approach (n = 44, 24 male) were then included in the overall statistical analysis (n = 91). The participants receiving artifact removal were not significantly different from those not receiving artifact removal in terms of reward/non-reward ERP amplitude, reward/non-reward ERP latency, age, sex or IQ, ts < 1.73.
