December 14, 2016 Mallory Grimste DBT Treatment Assumptions for Teens in Group Skills Training - a Topic Expert blog for GoodTherapy.org December 14, 2016 Mallory Grimste As a Topic Expert for GoodTherapy.org, I share how DBT's (Dialectical Behavior Therapy) Treatment Assumptions help for teens in group skills training. Mallory Grimste Mental Health Counseling for Teens and Young Adults physically located in CT or NY.