As the demand for community mental health services grows, more and more counselors-in-training are being asked to face the challenge of working with high needs clients, including clients with Borderline Personality Disorder (BPD). Counselors-in-training are entering therapeutic relationships with high-risk clients without training specifically covering BPD client's unique needs. This lack of training has the potential to limit the counselor self-efficacy (CSE) of counselors-in-training. Researchers speculate that counselor self-efficacy (CSE) impacts the outcome of therapy. Larson (1998) believes that CSE is one of the major indicators of effective counseling. However, without specific training in how to work effectively with personality disorders such as BPD, many counselors-in-training are feeling ineffective and incompetent with regards to their work with this growing and needy population. Several empirical studies have emerged on different psychotherapies and practices which may benefit individuals with BPD. The most empirically based therapy for clients with BPD is Dialectical Behavior Therapy (DBT) (Linehan, Armstrong, Suarez, Allmon, & Heard, 1991; Lynch, Chapman, Rosenthal, & Linehan, 2006; McMain & Korman, 2001; Neacsiu, Rizvi, & Linehan, 2010; Soler, et al., 2009). An understanding of the skills and interventions taught in DBT has been shown to be valuable not only to the client, but also therapists working with BPD individuals. One question that has not been addressed in the counseling literature is how training in DBT might impact the counselor self-efficacy of counselors-in-training with regards to their work with BPD clients. [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/en-US/products/dissertations/individuals.shtml.]