A Measure of State Persecutory Ideation for Experimental Studies

Experimental research is increasingly important in developing the understanding of paranoid thinking. An assessment measure of persecutory ideation is necessary for such work. We report the reliability and validity of the first state measure of paranoia: The State Social Paranoia Scale. The items in the measure conform to a recent definition in which persecutory thinking has the 2 elements of feared harm and perpetrator intent. The measure was tested with 164 nonclinical participants and 21 individuals at high risk of psychosis with attenuated positive symptoms. The participants experienced a social situation presented in virtual reality and completed the new measure. The State Social Paranoia Scale was found to have excellent internal reliability, adequate test-retest reliability, clear convergent validity as assessed by both independent interviewer ratings and self-report measures, and showed divergent validity with measures of positive and neutral thinking. The measure of paranoia in a recent social situation has good psychometric properties.

[1]  T. Brugha,et al.  SCAN. Schedules for Clinical Assessment in Neuropsychiatry. , 1990, Archives of general psychiatry.

[2]  A. Fenigstein,et al.  Paranoia and self-consciousness. , 1992, Journal of personality and social psychology.

[3]  P. Garety,et al.  Comments on the content of persecutory delusions: does the definition need clarification? , 2000, The British journal of clinical psychology.

[4]  A. Yung,et al.  Identification of young people at risk of psychosis: validation of Personal Assessment and Crisis Evaluation Clinic intake criteria. , 2000, The Australian and New Zealand journal of psychiatry.

[5]  M. Slater,et al.  Can Virtual Reality be Used to Investigate Persecutory Ideation? , 2003, The Journal of nervous and mental disease.

[6]  G. Dunn,et al.  The Psychology of Persecutory Ideation II: A Virtual Reality Experimental Study , 2005, The Journal of nervous and mental disease.

[7]  M. Coltheart,et al.  The Persecutory Ideation Questionnaire , 2006, The Journal of nervous and mental disease.

[8]  Paranoia : exploring a cognitive model and the assessment of persecution and reference. , 2006 .

[9]  D. Freeman.  Suspicious minds: the psychology of persecutory delusions. , 2007, Clinical psychology review.

[10]  P. McGuire,et al.  Virtual reality and paranoid ideations in people with an 'at-risk mental state' for psychosis. , 2007, The British journal of psychiatry. Supplement.