The goal of this pilot study is to test the feasibility and preliminary efficacy of the repetitive negative thinking (RNT) focused web-based self-help program in college students. The main questions it aims to answer are: * Does the program work without any help of a clinician? * Does the program have any reducing effect on the participants' RNT, depression, anxiety, stress and cognitive fusion scores? - Does the program help participants to improve their psychological flexibility and committed actions? Participants will be administered a set of questionnaires before and after completing the 10-day long web-based self-help program, provided on a daily basis. Researchers will compare the intervention group with a waitlist control group to assess for any potential placebo effect.
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Change from Baseline in Perseverative Thinking Questionnaire (PTQ) Scores
Timeframe: Baseline and Week 2