 Power analysis was based on the primary outcome variable: frequency of binge eating episodes. Assuming the three randomized groups DBT-USH, DBT-GSH and NS-UGS are equivalent at baseline, a between groups ANOVA will be used to compare them at post-treatment. Based on the findings of Masson et al. 2014, assuming an effect size of 0.40 and Type 1 error rate equal to .05, a sample size of at least 21 participants per group will yield 80 power. Assuming an attrition rate of 20, we will require 25 participants per group. 