Study on the Efficacy Mechanism of Natural Psychotherapy for Neurosis

This study is examining how nature-based psychotherapy — therapy sessions conducted in natural outdoor settings — works to treat obsessive-compulsive disorder (OCD). Researchers want to understand the brain and behavioral mechanisms behind any benefits. **You may be eligible if...** - You are between 16 and 55 years old - You have been diagnosed with OCD by a psychiatrist (using standard diagnostic criteria) - You have had OCD symptoms for at least 12 months - You are able to attend in-person assessments and complete the full trial **You may NOT be eligible if...** - You are pregnant or breastfeeding - You have a serious physical illness or brain disease - You have a history of substance or alcohol abuse - You are at high risk of suicide Talk to your doctor to see if this trial is right for you.