Table 1.
Mean differences of perceived effects for typical alcohol use, typical marijuana use, and typical SAM use.
| Alcohol Use Only | Marijuana Use Only | SAM Use | |||||
|---|---|---|---|---|---|---|---|
| Specific Effects | Mean | SD | Mean | SD | Mean | SD | |
| Clumsy | 1.26b | .91 | 1.11c | .99 | 1.59a | 1.08 | F(2, 387) = 22.97, p < 0.001 |
| Confused | .56c | .69 | .75b | .93 | 1.01a | 1.03 | F(2, 378) = 22.71, p < 0.001 |
| Dizzy | .61b | .75 | .48b | .86 | 1.07a | 1.08 | F(2, 382) = 35.54, p < 0.01 |
| Difficulty Concentrating | 1.06c | .92 | 1.39b | 1.13 | 1.52a | 1.10 | F(2, 380) = 19.879, p < 0.05 |
| General Effects | |||||||
| Drunk | 1.89b | 1.18 | - | - | 2.12a | 1.14 | t(285) = 2.923, p < .01 |
| High | 1.14c | 1.13 | 2.74a | .98 | 2.47b | .99 | F(2, 382) = 183.79, p < 0.001 |
| Feeling Alcohol Effects | 2.16a | .99 | - | - | 2.28a | 1.11 | t(248) = −1.750, p = .081 |
| Feeling Marijuana Effects | - | - | 2.61a | 1.10 | 2.36b | 1.02 | t(197) = 3.519, p < .001 |
Note. Posthoc pairwise comparisons evaluated differences of effects between pairs of substances. Different superscripts represent significant differences in effects (p < .05); same superscripts represent no significant difference.