Mark I. Appelbaum (1941-2020).

Memorializes Mark I. Appelbaum (1941-2020). Appelbaum was a giant in the field of quantitative psychology and developmental methodology. At the time of his passing, he was Professor Emeritus of Psychology at the University of California, San Diego. He was a distinguished researcher, teacher, and administrator who helped to transform research in psychology, education, and medicine by developing and applying methods for analyzing longitudinal data. He also was an award-winning teacher and mentor, an innovative administrator, and an individual with a passionate commitment to service-service to his colleagues, universities, and to the discipline. (PsycInfo Database Record (c) 2021 APA, all rights reserved).