Alejandro L. Mujica, et al. Medical Research Archives vol 10 issue 2. February 2022 Page 1 of 29 Copyright 2021 KEI Journals. All Rights Reserved https://esmed.org/MRA/mra/ ADDICTION BY DESIGN: Some Dimensions and Challenges of Excessive Social Media Use Authors Alejandro L. Mujica 1 , Charles R. Crowell 1 , Michael A. Villano 1 , Khutb M. Uddin 2 Affiliations 1 Department of Psychology, University of Notre Dame, Notre Dame, IN 46556 USA 2 Star Psychiatric Services P.C., South Bend, IN 46637 USA Corresponding author Charles R. Crowell, PhD, Email: ccrowell@nd.edu Author roles Mujica: Primary contributor to original conceptualization, contributed to revised conceptualization, prepared initial draft, contributed to final draft. Crowell: Contributed to initial conceptualization, contributed to initial draft, primary contributor to revised conceptualization, primary contributor to revised final draft, developed figures, finalized submission. Villano: Contributed to initial and revised conceptualization, contributed to revised final draft. Uddin: Contributed to final draft. Declaration of Interests: None. RESEARCH ARTICLE