The purpose of this study is to explore relational trauma in early childhood and its influence on the regulatory function of the autonomic nervous system (ANS) and corresponding personality structure. The method of inquiry will be a theoretical-hermeneutic and correlational design. Relational trauma in early childhood will be generally defined as an impairment of the ANS's ability to regulate one's psychobiological processes while experiencing an environmental stressor. These dysregulated processes consist of cognition, emotive feedback, and affect from one stimulus to the next, as a result of having experienced various degrees of one or more of the following: abandonment, neglect and/or physical abuse during the first two years of human development. Findings of this study suggest that when there has been relational trauma in early childhood, a more rigid and less flexible personality structure is developed allowing the adult in later years to experience the feeling of a more predictable internalized impression of stability (secure base). Furthermore, with the decrease in tolerance for ambiguity comes an increase in dualistic inflexible cognitive function.