Self reported worries about being harmed or at risk from others

Non-affective psychosis(ICD10,F20-F29)

Age 18-65

Symptoms stable no major relapse or crisis in last 3 months prior to consent

Sufficient command of English to provide informed consent, complete the measures and participate in the brief interventions

Score above the cutoff for clinically significant levels of paranoia on the Green Paranoid Thoughts Scale (Green et al, 2008)

Paranoia is triggered by being outside

Computerised Interventions for Thinking and Anxiety in Delusions (CITADEL) Trial