Table 1.
Descriptive Statistics of Level 1 and Level 2 Variables
| Variables | M | SD | Skew |
|---|---|---|---|
| Day-Level (L1) | |||
| Negative affect | 2.21 | 1.78 | 0.97 |
| Positive affect | 5.20 | 1.87 | 0.02 |
| Craving | 4.06 | 3.00 | 0.32 |
| Time with friends a | 0.46 | 0.40 | 0.40 |
| Time in places a | 0.54 | 0.40 | −0.05 |
| Time with cues a | 0.32 | 0.39 | 1.04 |
| Time with marijuana available a | 0.63 | 0.43 | −0.21 |
| Use days | 0.50 | 0.50 | 0.00 |
| Grams used on use days | 1.23 | 1.60 | 1.47 |
| Person-Level (L2) | |||
| Negative affect | 2.26 | 1.37 | 0.56 |
| Positive affect | 5.28 | 1.36 | 0.01 |
| Craving | 4.10 | 2.37 | 0.17 |
| Time with friends b | 0.47 | 0.25 | 0.15 |
| Time in places b | 0.55 | 0.27 | −0.28 |
| Time with cues b | 0.33 | 0.28 | 0.63 |
| Time with marijuana available b | 0.65 | 0.29 | −0.36 |
| Use days | 0.46 | 0.27 | −0.06 |
| Grams used on use days | 1.15 | 0.94 | 1.00 |
Note: N = 85. Level 1 observations = 462 person-days.
a
Represents the proportion of prompts youth indicated they were in one of these contexts on that given day.
b
Average proportion of prompts that person spends in that type of context across all study days.