The Early College High School (ECHS) Initiative was created to increase college readiness and postsecondary degree completion by combining high school and college to smooth the transition from secondary to higher education. Outcomes for ECHSs include high rates of student educational progress and degree completion for graduates. While ECHSs are expanding and increasing across the nation, the model of these institutions does not consider the overall development of its students. As scholars of higher education continue to study student development and the progress of the whole student, identity development of the adolescent population remains essential. This study uses mixed methods to explore and understand the experiences of ECHS students and how they perceive the influence of their ECHSs on the development of their current identity. The study focuses on the perspectives of ECHS graduates who attended high schools on various campuses of community colleges and were enrolled at different four-year colleges or universities during the time of the study. To explore identity and identity development, the researcher applies Erikson's (1968) Theory of Psychosocial Development and Marcia's (1966) Identity Status Theory as frameworks. Quantitative procedures use the Ego Identity Process Questionnaire (EIPQ) to assess the current identity status of ECHS graduates. Results reveal study participants in each of Marcia's four identity status categories. During qualitative procedures, interviews were conducted with several participants from each identity status category. Findings from this phase include similar ECHS experiences among participants, resulting in shared themes of the influence of their ECHSs on their current identity. The results also show that participants perceive their ECHSs develop some aspects of the identity of its students, but hinders other elements. Drawing on the findings, this study offers implications for practice and further research that emphasize the restructuring of the ECHS model to address the complete development of this unique population. [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.]