MASQ-SF GDD scale score) as well as problematic alcohol use (i.e. AUDIT scores) via anhedonia and substance-related coping behavior (i.e. substance use brief COPE subscale scores; Fig. 1a, b). All interaction predictor variables (i.e. CTQ scores and VS reactivity BOLD parameter estimates) were mean-centered prior to analyses. Unstandardized indirect effects were computed for each of 5000 bootstrapped samples, and the 95% confidence interval was computed by determining the indirect effects at the 2.5 and 97.5 percentiles. Model goodness of fit was assessed using root mean square residual (RMSEA < 0.05), standardized root mean square residual (SRMR < 0.05), and comparative fit index (CFI > 0.90) (Schermelleh-Engel et al. 2003). In an attempt to make the χ2 test less dependent on sample size, we used the relative χ2, which is calculated by dividing the χ2 fit index by the degrees of freedom. Congruent with prior literature (Schumacker and Lomax, 2004), if this ratio was <5 we deemed the model to have good fit.
