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Effect Size Differences (Cohen’s d) Between Virtual and Live Control Groups at Posttest Waves of Data for Two RCTs
| Study | Wave | Alcohol | Cigarettes | Marijuana |
|---|---|---|---|---|
| RCT-1 | 2 | 0.14 | 0.05 | −0.02 |
| 3 | −0.04 | 0.15 | −0.06 | |
| 4 | −0.02 | 0.21 | 0.02 | |
| 5 | −0.19 | 0.34 | −0.04 | |
| 6 | −0.08 | 0.47 | 0.16 | |
| 7 | 0.07 | 0.80 | 0.41 | |
| RCT-2 | 2 | −0.16 | 0.05 | −0.14 |
| 3 | −0.12 | 0.08 | −0.10 | |
