Study title

The study was a feasibility, double-blind randomized controlled trial of CBM-pa treatment for clinical paranoia compared to an active text reading control, both given in addition to treatment as usual. CBM-pa is a cognitive intervention that targets negatively biased interpretation of emotional ambiguity of the sort specifically related to paranoid thinking. It is self-administered on a computer without the need for a therapist to be involved. Participants were people suffering persistent, distressing paranoid symptoms at clinical levels. All participants visited the laboratory weekly for six weeks to receive either CBM-pa or the active control. Assessments comprised clinical interview, experimental measures of interpretation (online and pen/ paper), self-report measures of clinical symptoms, and behavioural/ real life measures of stress, distress and vulnerability. Assessments were conducted as follows: baseline assessment (T0); Interim assessments (I1-4); post treatment assessment (T1); postal/telephone follow-ups at 1-and 3-months (4 and 12 weeks from end of last session, respectively). The main dataset comprises: Feasibility trial assessment data for baseline (T0), post treatment (T1) and Follow up (T2, T3). The interim dataset comprises: Feasibility trial assessment data for interim sessions (I1-4).Many people with psychosis continue to have paranoid beliefs, despite the best treatments available. We will examine a new computer therapy, ‘Cognitive Bias Modification for paranoia’ (CBM-pa). CBM encourages people to develop alternative ways of interpreting difficult thoughts (i.e. “someone is watching me”), leading participants to change their understanding of what these situations might mean. CBM is used in anxiety 62,21, but has not been appropriately applied together disorders. Our version, CBM-pa, was developed with service user input. It is based on new research into the biases that people with paranoia have when interpreting events 61. It involves...