We ran a series of analyses: first using the raw alcohol use frequency variable, second using the square root transformed alcohol use frequency variable as the trait, and finally using a logarithmic transformed alcohol use frequency variable. This was done to test how robust the findings were to different types of transformations in scale. Moderation can be falsely detected as an artifact of heteroscedasticity. A square root or logarithmic transformation in this case normalized the distribution by reducing the skew, testing if the effects were robust to changes in scale.
