Admission to colleges and universities has sparked much interest over time. There are articles, books, and even movies designed to shed light on the process of being admitted to institutions. One component of the application process that has drawn a lot of attention is the use of standardized test scores. There are both advocates and critics of standardized exams. However, the test-optional movement has continued to grow over time. The COVID-19 pandemic forced testing sites to close and institutions to implement a test-optional policy. Institutions are now assessing if they should keep test-optional admission policies. This is a comparative interrupted times series study that analyzed the outcomes of implementing a test-optional admission policy. This study examined 68 colleges and universities that implemented a test-optional policy between 2010-2015. These schools were matched with a peer institution to create a comparison group. The purpose of this study was to investigate whether implementing a test-optional admission policy has an impact on the magnitude of applicants and full-time first-time students, the makeup of the study body by racial composition, and percent of Pell Grant recipients, and the success of the students through retention and graduation rate. This study found a 1.8% increase in the percent of Hispanic or Latino students in the freshmen class for institutions that implemented a test-optional policy. It also found a small decrease in Asian students in the freshman class after implementing a test-optional policy. There were no statistically significant results for the following outcomes: total applications, full-time first-time students, percent of White, percent of Black or African American, percent of Pell Grant recipients, retention rate, and 4-year graduation rate. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://www.proquest.com.bibliotheek.ehb.be/en-US/products/dissertations/individuals.shtml.]