a 20-week attachment-based intervention that aims to reduce the long-term risks associated with insecure attachment in children. It is individualized for a particular caregiver–child dyad on the basis of the child’s insecure attachment classification (e.g., anxious–resistant) and the caregiver’s behavior and internal working model of attachment. It is delivered in a systematic week-by-week, video-based group model and consists of both educational and therapeutic components. [developed by U.S. developmental psychologist Robert S. Marvin (1944– )]