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Means and standard deviations (SD) for each of the attention network and mean RT.
| Alerting | Orienting | Conflict | Mean RT | |
| MZ twins (n = 52) | ||||
| Mean (msec) | 42 | 60 | 71 | 482 |
| SD (msec) | 16 | 14 | 25 | 50 |
| DZ twins (n = 52) | ||||
| Mean (msec) | 38 | 52 | 90 | 513 |
| SD (msec) | 15 | 19 | 38 | 78 |
| Combined (n = 104) | ||||
| Mean (msec) | 40 | 56 | 80 | 498 |
| SD (msec) | 16 | 17 | 34 | 67 |
