Table 3.
Hierarchical Multiple Regressions Predicting Marijuana and Alcohol Use Willingness
| Predictor | ∆R2 | β | sr 2 | p | ∆R2 | β | sr 2 | p |
|---|---|---|---|---|---|---|---|---|
| Cannabis Use Willingness (N = 80) | Alcohol Use Willingness (n = 77)* | |||||||
|
|
|
|||||||
| Step 1 | .46 | < .001 | .18 | .002 | ||||
| Past Yr. Cannabis Use | .675 | .916 | < .001 | .025 | .177 | .830 | ||
| Past Yr. Alcohol Use | .002 | .148 | .985 | .414 | .900 | .001 | ||
| Other Willingness | .199 | .020 | .023 | .137 | .036 | .203 | ||
| Step 2 | .06 | .011 | .01 | .628 | ||||
| Past Yr. Cannabis Use | .724 | .805 | < .001 | .044 | .167 | .707 | ||
| Past Yr. Alcohol Use | .075 | .130 | .431 | .439 | .848 | .001 | ||
| Other Willingness | .228 | .017 | .007 | .125 | .034 | .256 | ||
| Condition | .187 | .001 | .039 | .070 | .024 | .541 | ||
| SIAS Score | .176 | .012 | .036 | .077 | .008 | .484 | ||
| Step 3 | .00 | .563 | .00 | .681 | ||||
| Past Yr. Cannabis Use | .713 | .800 | < .001 | .034 | .165 | .777 | ||
| Past Yr. Alcohol Use | .079 | .129 | .411 | .442 | .840 | .001 | ||
| Other Willingness | .226 | .017 | .008 | .118 | .033 | .292 | ||
| Condition | .109 | .001 | .503 | -.003 | .024 | .988 | ||
| SIAS Score | .120 | .012 | .348 | .027 | .008 | .873 | ||
| Condition X SIAS Score | .110 | .021 | .563 | .104 | < .001 | .681 | ||
Note: Past Yr. = number of cannabis or alcohol use occasions in the past year. Other Willingness = ASIDE willingness to accept control offers of food (cannabis model) or non-alcoholic beverages (alcohol model). SIAS = Social Interaction Anxiety Scale. Condition coded such that Neutral = 0 (referent) and Rejection = 1. sr2= squared structure coefficient. ∆R2 = R-square change.
*
three cases who reported no alcohol use in their lifetime were excluded from these analyses only.