Paranoia can be one of the most disabling psychological experiences. It can cause distress, other mental health problems, and problems in work, family, and social situations.

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STOP involves reading text that invites paranoid thoughts, but then teaches people to respond in an alternative, less paranoid, and less distressing way. A previous study using a similar treatment delivered on a desktop computer has shown promising results, and participants told us that taking part was a positive experience.

The STOP study transforms the desktop therapy into a more engaging and accessible mobile phone App for a wider range of people.