Additional Study Information: Emerging research has demonstrated a relationship between visual attention patterns and anxiety disorders, including PTSD. This study is designed to examine these visual attention patterns using eye-tracking A simple device that monitors eye-movements. The study included two sessions conducted approximately 1 week apart, each no longer than 1 hour. In both sessions, you will perform a simple computer task while eye-data will be recorded. Session 1 can be conducted inside an MRI or without scanning. Session 2 has no MRI testing.