Table 3.
The peak amplitude and latency of the feedback-related negativity (FRN) and P300 in event-related brain potential (ERP) difference waves in frontal-central electrodes in the methamphetamine (MA) group and HC group.
| MA group | HC group | Group effects | Electrode effect | Group*electrode | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Fz | FCz | Cz | Fz | FCz | Cz | F | p | F | p | F | p | |
| FRN amplitude (μV) | -2.73 (6.77) |
-2.73 (6.68) |
-0.10 (6.23) |
-4.81 (6.83) |
-5.77 (6.90) |
-4.54 (5.66) |
4.56 | 0.037 | 5.86 | 0.012 | 3.00 | 0.054 |
| FRN latency (ms) | 258.19 (26.71) |
258.97 (19.07) |
254.06 (20.21) |
246.22 (29.32) |
242.96 (26.81) |
236.74 (12.38) |
7.56 | 0.008 | 2.51 | 0.102 | 0.37 | 0.625 |
| P300 amplitude (μV) | 22.69 (7.74) |
27.93 (8.67) |
27.87 (8.14) |
25.45 (12.39) |
31.04 (14.03) |
28.96 (12.21) |
0.72 | 0.400 | 48.03 | <0.01 | 1.68 | 0.19 |
| P300 latency (ms) | 405.80 (32.51) |
401.80 (27.32) |
402.83 (26.17) |
439.41 (71.87) |
448.15 (78.15) |
459.70 (78.99) |
10.21 | 0.002 | 3.53 | 0.041 | 6.06 | 0.006 |
The data are the mean (SD).
Bold values indicate significance at P < 0.05 compared with the HC group.