She completed her Bachelor of Arts degree in Psychology at Oklahoma State University and her Master of Arts degree and Doctorate in Clinical Psychology at the University of Tulsa. Dr. Harrington completed her child and pediatric clinical internship and a one year fellowship at the University of Alabama at Birmingham. Her training sites included the Civitan-Sparks Interdisciplinary Clinics, a Leadership Education in Neurodevelopmental Disabilities (LEND) and University Center of Excellence in Developmental Disabilities training site (UCEDD), and Children's of Alabama. While in graduate school, Dr. Harrington was awarded the Scientist Practitioner Award in recognition of her work in meeting the ideas of the scientist practitioner model of psychology training and practice.