Average reaction times before and after alcohol (cm)
| Caffeine | Before | After |
| Yes | 11.83 | 18.30 |
| Yes | 11.16 | 17.80 |
| Yes | 11.94 | 19.00 |
| Yes | 12.04 | 19.01 |
| Yes | 12.14 | 19.20 |
| Yes | 12.61 | 18.70 |
| Yes | 12.07 | 18.55 |
| Yes | 12.16 | 18.20 |
| No | 12.02 | 19.79 |
| No | 11.14 | 17.40 |
| No | 11.10 | 17.90 |
| No | 11.89 | 16.60 |
| No | 12.09 | 17.50 |
| No | 11.93 | 19.00 |
| No | 12.16 | 18.60 |
| No | 12.64 | 20.00 |