We propose to conduct a clinical trial of a decision aid for veterans with PTSD. Decision aids are standardized, evidence-based tools to help patients choose between two or more preference-sensitive, clinically acceptable options when there is no clear "best" option. Decision aids are designed to provide patients with detailed balanced information about all the viable treatment options. In addition, they seek to assist the patient in clarifying their own values and preferences such that the patient may choose among the available treatment options.