Latencies and amplitudes of each electrophysiological component as a function of group and session
| Group; session | ERP component; mean (SD) | |||||
|---|---|---|---|---|---|---|
| P1 | N2 | P3b | ||||
| Latency, msec | Amplitude, mv | Latency, msec | Amplitude, mv | Latency, msec | Amplitude, mv | |
| Binge drinkers | ||||||
| Session 1 | 124 (12.5) | 2.87 (1.06) | 216 (17.8) | −2.49 (1.54) | 407 (78.6) | 3.83 (1.72) |
| Session 2 | 133 (21.6) | 2.96 (1.19) | 230 (17.9) | −2.24 (1.27) | 481 (89.3) | 3.82 (1.93) |
| Difference* | 8.94 (18.5) | 0.09 (1.56) | 13.83 (27.38) | 0.005 (0.77) | 73.07 (89.07) | −0.006 (1.55) |
| Controls | ||||||
| Session 1 | 126 (12.6) | 2.47 (1.33) | 222 (24.2) | −2.41 (1.75) | 422 (71.3) | 4.62 (3.04) |
| Session 2 | 110 (11.4) | 2.51 (1.48) | 201 (18.2) | −2.07 (1.23) | 411 (98.4) | 4.07 (1.86) |
| Difference* | −15.87 (16.22) | 0.05 (1.54) | −20.61 (21.59) | −0.67 (1.39) | −11.88 (84.23) | −0.55 (1.53) |
ERP = event-related potential; SD = standard deviation.
↵* Results represent the mean variation of latency–amplitude values between sessions 1 and 2 (session 2 – session 1). The positive differences for latencies among binge drinkers illustrate latency delays at session 2 in this group (with the reverse pattern among controls).