This document discusses attachment theory and mentalization. It outlines 4 main attachment styles - secure, anxious-preoccupied, dismissive-avoidant, and disorganized - and describes the characteristics of each in terms of self and other perception, emotion regulation, and mental state. It then defines mentalization as the ability to understand one's own and others' mental states. Poor mentalization is linked to stress, personality problems, communication issues, overwhelming emotions, impulsivity, and addiction. Finally, it notes the relevance of mentalization in addiction treatment and lists instruments used to measure attachment and mentalization.