Table 2.
Behavioral Performance during the Emotional Word-Face Stroop Task.
| Measures | Mean | SD | Range | Mean | SD | Range | Paired t-test |
||
|---|---|---|---|---|---|---|---|---|---|
| Difference | p-value | ||||||||
| Congruent | Incongruent | ||||||||
| Reaction Time (ms) | 729.36 | 62.65 | 664–875.1 | 752.68 | 58.09 | 672.7–882 | 17.944 | <0.003 | ** |
| Accuracy % | 0.90 | 0.09 | 0.69–1 | 0.89 | 0.08 | 0.71–0.98 | 0.006 | 0.538 | ns |
| Timeouts % | 0.04 | 0.05 | 0–0.2 | 0.06 | 0.05 | 0.01–0.21 | 0.027 | <0.001 | *** |
| Twins with Stress | Control Co-Twins | ||||||||
| Congruent RT (ms) | 734.66 | 70.64 | 686.9–875.1 | 724.05 | 58.72 | 664–837.8 | 10.404 | 0.786 | ns |
| Incongruent RT (ms) | 757.89 | 65.37 | 698.8–882 | 747.46 | 54.55 | 672.7–840.3 | 13.464 | 0.714 | ns |
| I-C RT (ms) | 23.23 | 14.78 | 6.93–51.19 | 23.41 | 16.47 | 2.48–45.22 | 3.061 | 0.718 | ns |
| I-C/C RT (ms) | 0.03 | 0.02 | 0.008–0.073 | 0.03 | 0.02 | 0.003–0.061 | 0.003 | 0.755 | ns |
| Congruent Accuracy % | 0.90 | 0.09 | 0.75–1 | 0.90 | 0.10 | 0.69–0.97 | 0.018 | 0.525 | ns |
| Incongruent Accuracy % | 0.89 | 0.08 | 0.75–0.98 | 0.89 | 0.09 | 0.71–0.97 | 0.017 | 0.444 | ns |
| I-C ACC | −0.01 | 0.02 | −0.03–0.03 | −0.01 | 0.05 | −0.09–0.06 | 0.001 | 0.967 | ns |
| I-C/C ACC | 0.00 | 0.03 | −0.03–0.04 | 0.00 | 0.05 | −0.1–0.07 | 0.000 | 0.989 | ns |
| Congruent Timeouts % | 0.05 | 0.07 | 0.00–0.20 | 0.04 | 0.04 | 0.00–0.12 | 0.005 | 0.643 | ns |
| Incongruent Timeouts % | 0.06 | 0.07 | 0.009–0.21 | 0.05 | 0.04 | 0.01–0.13 | 0.009 | 0.702 | ns |
Note. Significant results in bold. *p < 0.05, **p < 0.01, ***p < 0.001, †p < 0.10, n = 7 twin pairs.