This authoritative volume offers a comprehensive and developmentally integrated examination of how attachment is assessed from infancy through adulthood. Bringing together leading experts in the field, the book explains both classic and contemporary methods for measuring attachment behaviors and internal representations, grounding each approach in its conceptual and empirical foundations. By situating diverse assessment tools within a coherent developmental framework, it helps readers understand how attachment processes unfold and can be evaluated across the lifespan. Key Features: Provides in-depth coverage of major attachment assessment tools, including the Strange Situation, Attachment Q-set, Ainsworth’s Maternal Sensitivity Scales, Adult Attachment Interview, Attachment Script Assessments, and the Adult Attachment Projective Picture System Includes discussion of analogue and experimental methods alongside established clinical and research measures Clarifies the theoretical and empirical bases underlying each assessment approach Integrates measures within a lifespan developmental framework, from infancy to adulthood Explores core attachment constructs such as attachment security, secure base behavior, disorganization, and narrative structure Supports both research and clinical practice by explaining appropriate use, interpretation, and limitations of attachment measures Serves as a key reference for psychologists, clinicians, and researchers working with attachment assessments