Research has shown that there is a lack of formal training in suicide for mental health professionals in graduate psychology programs (Bongar & Harmatz, 1991; Batista, 2007). Suicide is a public health issue, with one suicide occurring approximately every 16 minutes in the United States (www.cdc.gov). A recently developed theory on why people die by suicide, the interpersonal-psychological theory, has gathered empirical support as an important way to think about suicide (Joiner, 2005). This study investigated the effects of a brief training on suicide that utilized Dr. Thomas Joiner's interpersonal-psychological theory. The presentation was given to graduate students who were therapists-in-training. The sample consisted of psychology graduate students (N=13) who attended an hour-long workshop on suicide. The participants filled out a pre-test measure before the presentation, and a post-test measure immediately following the training. The study examined the effects of the training, using measures created specifically for this purpose. The survey items measured whether confidence in working with suicidal clients increased and discomfort related to working with this population decreased. The questions assessed whether knowledge of current research on suicide increased, along with an understanding of risk factors. Lastly, the survey assessed whether a conceptual understanding of Dr. Thomas Joiner's interpersonal-psychological theory was gained. Results indicated that participants demonstrated a statistically significant increase in knowledge for the following items: what factors enable someone to die by suicide, familiarity with current research on risk factors for suicide, familiarity with Joiner's interpersonal-psychological theory and awareness of resources for working with suicidal 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.]