Table 2. Mean and standard deviation of the amplitudes for the different conditions and genotypes.
| DAT1 | DRD4 | |||||
| 9R | 10/10R | t 1-value (p) | no 7R | 7R | t 1-value (p) | |
| ERN | ||||||
| – correct | 1.01 (2.22) | .70 (2.56) | .77 (.442) | .95 (2.34) | .49 (2.66) | 1.08 (.281) |
| – incorrect | −2.78 (3.06) | −3.18 (3.43) | .76 (.451) | −3.24 (3.29) | −2.48 (3.27) | −1.32 (.187) |
| – difference | −3.78 (3.30) | −3.88 (3.23) | .189 (.850) | −4.19 (3.01) | −2.98 (3.65) | −2.18 (.031)* |
| Pe | ||||||
| – correct | 5.16 (3.55) | 4.12 (3.68) | 1.77 (.079)+ | 4.53 (3.41) | 4.52 (4.25) | .02 (.984) |
| – incorrect | 8.96 (3.24) | 8.99 (3.64) | −.05 (.957) | 8.92 (3.45) | 9.12 (3.59) | −.32 (.753) |
| – difference | 3.80 (3.37) | 4.87 (3.36) | −1.97 (.051) + | 4.40 (3.24) | 4.60 (3.78) | −.34 (.731) |
Standard deviations are shown in parentheses; significant differences are marked with *, trends are marked with +; 1 df = 158, two-sided tests.