This study involves a brief phone screen and research assessment (approximately 5 hours) to determine eligibility. Eligible participants will receive CBT-GSH, which will include a one-hour clinical intake followed by 6 therapy sessions (approximately 30 minutes each). Participants will also complete research assessments at mid-treatment, post-treatment, and 3 month follow-up intervals. Research assessments include a battery of questionnaires, computerized tasks, interviews, and a task using functional Near Infrared Spectroscopy (fNIR) imaging.