“…Baseline functioning (e.g., psychiatric distress, coping style), adjustment to treatment (e.g., relationships with peers), and perceptions of treatment (e.g., program alliance, therapeutic factors) have been identified as key process variables that may positively or negatively influence treatment outcomes (Demmel & Rist, 2005; Harrison et al 2017; Ilgen et al 2006). For instance, higher psychiatric distress at baseline (Daughters, et al, 2005) and negative peer relationships within residential substance use treatment programs (Harrison, et al, 2017) have been linked with poorer substance treatment outcomes. Similarly, therapeutic influences such as promotion of feelings of hope and connectedness to the treatment have been implicated in the effectiveness of group-based treatments among populations including high-risk patients (Hauber, et al, 2019), individuals with personality disorders (Friedman & Downey, 2016), and substance use treatment groups (Amram & Benbenishty, 2014).…”