Nearly 600 instruments are reviewed in this new edition of occupational therapy’s classic publication, including many developed by occupational therapists. An international team of academicians, clinicians, researchers, and advanced-degree candidates working in various practice arenas collaborated on this update. The assessment profiles—which include title, authors, format, purpose, population, time required to administer, setting or position, materials or tools, brief description, interpretation, reliability and validity, source, additional references, cost, and sample—will be useful to clinicians and students, who must choose appropriate tools for clinical practice; to educators, who select assessment procedures for the classroom; and to researchers, who will find instruments that are designed for research purposes or will benefit from further investigation. This edition includes a matrix of all assessments, showing content areas and age ranges of each instrument.