Previous research has emphasized the importance of a positive identity in the rehabilitation of individuals with traumatic brain injury (TBI) and although identity is constructed and negotiated socially, through the use of language, there is little research available on the linguistic tools used by this population in constructing their identities. This study investigates what can be learned about identity construction from conversations with individuals with TBI and their caregivers and what systemic functional linguistic (SFL) analysis reveals about how linguistic choices made by the speakers contribute to identity construction in relation to the experiences of a TBI and its consequences. This qualitative study investigates the conversations of three individuals with TBI using the linguistic analysis tools of SFL to examine how identity is constructed by these three individuals with TBI in conversations with the researcher and a stranger as well as the identities assigned them by their program manager and guardian when in conversation with the researcher. The results of this study highlighted overarching identities for the individuals with TBI that related to power and control. Such identities were constructed using tools of appraisal, modality, experiential configurations and thematic progression. While the caregivers often assigned these individuals the roles of dependent victim and patient, thereby asserting their caregiver role, the individuals with TBI were observed to emphasize their own control and "in charge" identities. This research highlights the value of using linguistic analysis to look at the linguistic construction of identity and may inform intervention in promoting positive identity construction in this 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.]