Memorializes Evelyn Perloff (1921-2022). During the mid-20th century, Dr. Perloff embarked on a lifelong career as a psychologist, characterized by an abiding concern with scientific measurement and a passion that impelled her to launch an international database on psychosocial instruments years before databases became de rigueur in the behavioral sciences. She was a staunch advocate for measurement as a quintessential engine of science and professional practice and was a visionary provider of measurement-related information for students, researchers, and practitioners in the health and psychosocial sciences. (PsycInfo Database Record (c) 2022 APA, all rights reserved).