 Participation in this study will last 12 months. Participants with SAD will be randomly assigned to receive CBT, ACT, or a waitlist condition. Both CBT and ACT treatments will include 12 weekly sessions that will deal with objects and situations that provoke anxiety. All sessions will be audio- and videotaped. The waitlist group will complete weekly self-monitoring forms to track anxiety and panic and will receive a phone call from a research coordinator every 2 weeks to make sure symptoms have not worsened. After 12 weeks, participants on the waitlist will be offered treatment. 