The Family System Test (FAST), developed by Thomas M. Gehring, is an important new tool for investigating family relations. Based on the structural-systemic theory of families, it is a figural technique for representing emotional bonds (cohesion) and hierarchical structures in the family or similar social systems. In this volume, the editors draw on the available theory and research in family or similar social systems together with a variety of empirical studies that have used the FAST, to provide a comprehensive overview and assessment of the test and its use in various clinical research...