One of the key challenges of all types of practice and research is finding a way to measure a given problem. The seminal Measures for Clinical Practice and Research two-volume set contains hundreds of the most useful measurement tools--alongside the authors' guidance on how to select and score them--for use in clinical practice and in research. Focusing on measures for use with couples, families, and children, this first volume includes an introduction to the basic priniciples of measurement, an overview of different types of measures, and an overview of Rapid Assessment Instruments. The text also contains descriptions and reviews of each instrument and information on how they were selected.This book is designed to serve as the definitive reference volume on assessment measures for both practice and research in clinical mental health, and Volume 1 is updated with a new preface, new instruments for measuring children's clinical conditions, several new measures for couples and families, and six new chapters. These classic Measures for Clinical Practice and Research compendiums are powerful tools that clinicians and researchers alike will find to be an invaluable addition to--or update of--their libraries.