Table 1.
Multivariate ANOVA results for relations between marijuana use frequency and social anxiety, marijuana-related problems, marijuana effect expectancies.
| Dependent Variables | Nonusers M (SD) |
Infrequent Users M (SD) |
Frequent Users M (SD) |
F |
|---|---|---|---|---|
| Social anxiety | 23.63 (11.63)a | 22.25 (12.13)a | 22.23 (13.10)a | .43 |
| Marijuana problems | .13 (.71) | 1.68 (3.05) | 5.30 (4.87) | 66.93** |
| MEEQ cognitive & behavioral impairment | 30.10 (10.03)a | 33.45 (7.84)a | 31.34 (7.67)a | 4.31* |
| MEEQ relaxation & tension reduction | 22.60 (9.69) | 25.87 (7.59) | 29.04 (5.26) | 18.32*** |
| MEEQ social & sexual facilitation | 24.33 (5.89)a | 24.69 (6.35)a | 27.33 (5.94) | 7.85** |
| MEEQ perceptual & cognitive enhancement | 21.24 (8.59)a | 23.31 (6.61)a | 26.28 (5.01) | 14.58** |
| MEEQ global negative effects | 23.97 (8.55) | 19.58 (6.36) | 15.68 (5.14) | 39.30** |
| MEEQ craving & physical effects | 17.26 (6.92) | 23.53 (5.32)a | 24.35 (3.67)a | 53.66** |
| MEEQ negative | 54.08 (18.17)a | 53.11 (12.41)a | 47.08 (11.20) | 7.41** |
| MEEQ positive | 68.23 (23.41)a | 74.11 (17.80)a | 82.71 (13.49) | 16.05** |
Note. Marijuana effect expectancies were measured using the Marijuana Effect Expectancy Questionnaire (MEEQ) (Aarons et al., 2001), social anxiety with the Social Interaction Anxiety Scale (Mattick & Clarke, 1998), and marijuana problems with the Marijuana Problems Scale (Stephens et al., 2000). Marijuana use frequency grouping: nonusers (those who never used marijuana; n = 105), infrequent users (less than weekly marijuana use; n = 122), and frequent users (weekly or more marijuana use; n = 109).
a
Means not significantly different from one another (p < .01).
*
p < .05
**
p < .01
***
p < .001.