Table 1.
Demographics, cognitive control, and trait affect measures for short and long 5-HTTLPR genotype groups; mean (SD).
| Short (SS/SLG/LGLG) | Long (LALA) | p-value | ||
|---|---|---|---|---|
| DEMOGRAPHICS | ||||
| N (sample size) | 21 | 21 | 1.0 | |
| Age in years | 19.6 (1.7) | 20.8 (8.6) | 0.57 | |
| Gender | F: 11 | F: 10 | 0.76 | |
| M: 10 | M: 11 | |||
| Ethnicity (No. of Caucasian) | 18 | 21 | 0.18 | |
| COGNITIVE CONTROL TASKS | ||||
| N-back working memory | ||||
| Accuracy | 1-back: | 95.9% (9) | 96% (15) | 0.98 |
| 2-back: | 95.5% (11) | 92.3% (10) | 0.34 | |
| 3-back: | 81.6% (19) | 84.8% (18) | 0.61 | |
| Reaction Time | 1-back: | 597 ms (159) | 556 ms (167) | 0.45 |
| 2-back: | 674 ms (164) | 678 ms (186) | 0.95 | |
| 3-back: | 747 ms (228) | 723 ms (311) | 0.79 | |
| Stop signal reaction time (SSRT) | ||||
| 220 ms (29) | 222 ms (49) | 0.90 | ||
| TRAIT AFFECT SELF-REPORT MEASURES | ||||
| STAI state anxiety | 46.6 (19) | 33.9 (20) | 0.048* | |
| Percentile score | ||||
| NEO-FFI | ||||
| Neuroticism | 30.05 (7) | 27.74 (6) | 0.19 | |
| Negative affect | 14.67 (3) | 12.95 (3) | 0.07 | |
| Self-reproach | 15.38 (5) | 14.29 (5) | 0.46 | |
| Extraversion | 42.52 (5) | 45.48 (8) | 0.17 | |
| Positive affect | 14.33 (3) | 16.48 (2) | 0.005* | |
| Sociability | 13.86 (2) | 14.33 (4) | 0.60 | |
| Activity | 14.05 (3) | 14.76 (3) | 0.43 | |
*
Significant group difference.