Table 3.
Comparison of late positive potentials (LPPs) that averaged between 350 and 750 ms post-stimulus onset across the three groups.
| Late positive potential (μV) | HC | IGD | OCD | Statistical analysisa | Post-hoc analysis | |||
|---|---|---|---|---|---|---|---|---|
| (N = 23) | (N = 20) | (N = 20) | F | P | IGD vs. HC | OCD vs. HC | IGD vs. OCD | |
| GAME STIMULI (LOL, FIFA, SA) | ||||||||
| CP1 electrode site | 0.3 (1.3) | 1.6 (1.6) | 1.1 (1.7) | 4.253 | 0.019* | 0.015* | 0.193 | 0.527 |
| CPz electrode site | −0.2 (1.4) | 1.2 (2.1) | 0.3 (1.6) | 3.370 | 0.041* | 0.034* | 0.671 | 0.230 |
| CP2 electrode site | 0.4 (1.2) | 0.6 (2.1) | 1.0 (1.9) | 0.668 | 0.516 | 0.932 | 0.494 | 0.731 |
| P1 electrode site | 2.5 (1.8) | 3.6 (2.5) | 2.7 (1.2) | 1.857 | 0.165 | 0.164 | 0.930 | 0.331 |
| Pz electrode site | 2.4 (1.8) | 3.4 (1.9) | 2.8 (2.0) | 1.485 | 0.235 | 0.205 | 0.730 | 0.622 |
| P2 electrode site | 2.3 (1.6) | 3.8 (1.8) | 3.1 (2.2) | 3.525 | 0.036* | 0.027* | 0.347 | 0.455 |
| OCD-RELATED STIMULI (WASHING, CHECKING) | ||||||||
| CP1 electrode site | 0.2 (1.4) | 0.5 (1.6) | 1.3 (1.5) | 2.742 | 0.073 | 0.857 | 0.069 | 0.222 |
| CPz electrode site | −0.3 (1.1) | 0.1 (2.3) | 0.6 (2.3) | 1.290 | 0.283 | 0.820 | 0.254 | 0.602 |
| CP2 electrode site | 0.5 (1.5) | −0.5 (1.4) | 1.3 (2.1) | 5.744 | 0.005* | 0.149 | 0.251 | 0.004** |
| P1 electrode site | 2.5 (2.2) | 2.7 (2.3) | 3.1 (1.3) | 0.509 | 0.603 | 0.942 | 0.581 | 0.795 |
| Pz electrode site | 2.2 (1.8) | 2.6 (1.8) | 3.4 (1.5) | 2.444 | 0.095 | 0.716 | 0.080 | 0.365 |
| P2 electrode site | 2.2 (1.7) | 3.2 (2.0) | 3.6 (1.9) | 3.528 | 0.036* | 0.190 | 0.033* | 0.713 |
| NEUTRAL STIMULI (IAPS NEUTRAL) | ||||||||
| CP1 electrode site | 0.0 (1.4) | 0.3 (1.4) | 0.5 (1.9) | 0.578 | 0.564 | 0.776 | 0.546 | 0.931 |
| CPz electrode site | −0.5 (1.5) | 0.1 (2.0) | −0.1 (1.7) | 0.673 | 0.514 | 0.500 | 0.728 | 0.933 |
| CP2 electrode site | 0.1 (1.5) | −1.0 (1.6) | 0.4 (1.7) | 2.595 | 0.083 | 0.230 | 0.814 | 0.080 |
| P1 electrode site | 2.2 (2.1) | 2.3 (2.2) | 1.3 (0.3) | 0.169 | 0.845 | 0.956 | 0.947 | 0.831 |
| Pz electrode site | 1.9 (2.0) | 2.3 (1.6) | 2.4 (1.6) | 0.536 | 0.588 | 0.759 | 0.581 | 0.958 |
| P2 electrode site | 2.0 (1.9) | 2.7 (2.0) | 2.8 (2.0) | 1.313 | 0.277 | 0.410 | 0.311 | 0.982 |
HC, healthy control; IGD, internet gaming disorder; OCD, obsessive-compulsive disorder; LOL, League of Legend; SA, Sudden Attack; IAPS, International Affective Picture System.
Data are presented as means (standard deviation).
*
P < 0.05.
**
P < 0.005.
a
Analysis of variance.