All eligible participants will be asked to complete the following:
1) Clinical interview and self-report questionnaires
2) fMRI scans
3) At-home activity and mood monitoring.
Participants with depression will receive CCBT and be randomly assigned to one of two study groups:
1) Early CCBT – begin CCBT within 0-14 days from Visit #1 and after the completion of the first fMRI scan. Participation in the Early CCBT group lasts approximately 8 weeks.
2) Late CCBT – start CCBT within 15-28 days from Visit #1 and after completing two fMRI scans - these fMRI scans must be at least 14 days apart from each other. Participation in the Late CCBT group lasts 12 weeks.
Participants without depression will not receive CCBT and participate in 3 study visits over approximately 8 weeks.
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