Ratings of valence and arousal of the visual stimuli
| Valence (mean ± SD) | Arousal (mean ± SD) | |||||
|---|---|---|---|---|---|---|
| Unpleasant | Neutral | Pleasant | Unpleasant | Neutral | Pleasant | |
| All genotypes | 1.78 ± 0.79 | 6.02 ± 1.08 | 7.67 ± 0.76 | 5.35 ± 2.48 | 2.31 ± 1.52 | 4.65 ± 1.43 |
| met/met | 1.61 ± 0.68 | 6.20 ± 0.79 | 7.54 ± 0.59 | 6.50 ± 2.47 | 2.22 ± 1.45 | 4.31 ± 1.31 |
| val/met | 1.80 ± 0.93 | 6.01 ± 1.26 | 7.68 ± 0.90 | 4.46 ± 2.47 | 2.02 ± 1.43 | 4.51 ± 1.45 |
| val/val | 1.98 ± 0.62 | 5.80 ± 1.09 | 7.83 ± 0.64 | 6.03 ± 1.98 | 3.18 ± 1.84 | 5.50 ± 1.50 |
The valence scale is from 1 (unpleasant) to 9 (pleasant); the arousal scale is from 1 (not arousing) to 9 (very arousing).