The fourth edition of this essential resource has dozens of new scales as well as updated information for existing instruments, expanding and cementing its utility for members of all the helping professions, including psychology, social work, psychiatry, counseling, nursing, and medicine. Each instrument is reproduced in its entirety and critiqued by the editors, who provide guidance on how to select and score them. This volume focuses on scales for use with adults; its companion provides a range for couples, families, and children. Alone or as a set, these classic compendiums are powerful tools that clinicians and researchers alike will find an invaluable addition to or update of their libraries. Giving clinicians the scales they need to measure their clients problems and monitor their outcomes, these all-in-one sourcebooks bring effective, accountable practice within reach for today's busy professionals.