Reflective Functioning (RF) is the psychological process underlying mentalization, or the ability to understand and infer the mental states of the self and others. The Adult Attachment Interview (AAI) is a structured clinical interview that asks questions about early childhood experiences and parental relationships. The coding of this group focuses on the mentalization process of the interviewee by investigating their relationship with the self and the other. The interviewee discusses their mental and emotional processes of past, current, and future relationships through a series of prompts given within the AAI. We will be using the Reflective Functioning Manual (Fonagy, Target, Steele, & Steele, 1998) to code RF in transcribed Adult Attachment Interviews collected during the RCT for Group Attachment Based Intervention (GABI).