1Beck, AT. Thinking and depression: idiosyncratic content and cognitive distortions. Arch Gen Psychiatry 1963; 9: 324–33.
2Kapur, S. Psychosis as a state of aberrant salience: a framework linking biology, phenomenology, and pharmacology. Am J Psychiatry 2003; 160: 13–23.
3Freeman, D. Persecutory delusions: a cognitive perspective on understanding and treatment. Lancet Psychiatry 2016; 3: 685–92.
4Freeman, D, Dunn, G, Murray, R, Evans, N, Lister, R, Antley, A, et al. How cannabis causes paranoia: using the intravenous administration of ∆9-tetrahydrocannabinol (THC) to identify key cognitive mechanisms leading to paranoia. Schizophr Bull 2015; 41: 391–9.
5Selzam, S, Coleman, J, Caspi, A, Moffitt, E, Plomin, R. A polygenic p factor for major psychiatric disorders. Transl Psychiatry 2018; 8: 205.
6Birchwood, M, Smith, J, MacMillan, F, Hogg, B, Prasad, R, Harvey, C, et al. Predicting relapse in schizophrenia: the development and implementation of an early signs monitoring system using patients and families as observers. Psychol Med 1989; 19: 649–56.
7Jørgensen, P. Schizophrenic delusions: the detection of warning signals. Schizophr Res 1998; 32: 17–22.
8Carter, L, Read, J, Pyle, M, Morrison, A. ‘I believe I know better even than the psychiatrists what caused it’: exploring the development of causal beliefs in people experiencing psychosis. Community Ment Health J 2018; 54: 805–13.
9Bechdolf, A, Schultze-Lutter, F, Klosterkötter, J. Self-experienced vulnerability, prodromal symptoms and coping strategies preceding schizophrenic and depressive relapses. Eur Psychiatry 2002; 17: 384–93.
10Gumley, AI, MacBeth, A, Reilly, JD, O'Grady, M, White, RG, McLeod, H, et al. Fear of recurrence: results of a randomized trial of relapse detection in schizophrenia. Br J Clin Psychol 2015; 54: 49–62.
11Møller, P, Husby, R. The initial prodrome in schizophrenia: searching for naturalistic core dimensions of experience and behavior. Schizophr Bull 2000; 26: 217–32.
12Yung, AR, McGorry, PD, McFarlane, CA, Jackson, HJ, Patton, GC, Rakkar, A. Monitoring and care of young people at incipient risk of psychosis. Schizophr Bull 1996; 22: 283–303.
13Ruhrmann, S, Schultze-Lutter, F, Salokangas, R, Heinimaa, M, Linszen, D, Dingemans, P, et al. Prediction of psychosis in adolescents and young adults at high risk: results from the prospective European prediction of psychosis study. Arch Gen Psychiatry 2010; 67: 241–51.
14Mishara, AL, Fusar-Poli, P. The phenomenology and neurobiology of delusion formation during psychosis onset: Jaspers, Truman symptoms, and aberrant salience. Schizophr Bull 2013; 39: 278–86.
15Peralta, V, Cuesta, MJ. Dimensional structure of psychotic symptoms: an item-level analysis of SAPS and SANS symptoms in psychotic disorders. Schizophr Res 1999; 38: 13–26.
16Ronald, A, Sieradzka, D, Cardno, A, Haworth, C, McGuire, P, Freeman, D. Characterization of psychotic experiences in adolescence using the Specific Psychotic Experiences Questionnaire (SPEQ): findings from a study of 5000 16 year old twins. Schizophr Bull 2014; 40: 868–77.
17Freeman, D, Waite, F, Emsley, R, Kingdon, D, Davies, L, Fitzpatrick, R, et al. The efficacy of a new translational treatment for persecutory delusions: study protocol for a randomized controlled trial (the Feeling Safe Study). Trials 2016; 17: 134.
18Freeman, D, Garety, PA. Comments on the content of persecutory delusions: does the definition need clarification? Br J Clin Psychol 2000; 39: 407–14.
19Haddock, G, McCarron, J, Tarrier, N, Faragher, FB. Scales to measure dimensions of hallucinations and delusions: the psychotic symptom rating scales (PSYRATS). Psychol Med 1999; 29: 879–89.
20Freeman, D, Bird, JC, Loe, BS, Kingdon, D, Startup, H, Clark, D, et al. The Dunn Worry Questionnaire and the Paranoia Worries Questionnaire: new assessments of worry. Psychol Med 2019; .
21Cicero, DC, Kerns, JG, McCarthy, DM. The Aberrant Salience Inventory: a new measure of psychosis proneness. Psychol Assess 2010; 22: 688–701.
22Bell, V, Halligan, PW, Ellis, HD. The Cardiff Anomalous Perceptions Scale (CAPS). Schizophr Bull 2006; 32: 366–77.
23Sierra, M, Berrios, GE. The Cambridge Depersonalization Scale: a new instrument for the measurement of depersonalization. Psychiatry Res 2000; 93: 153–64.
24IBM. SPSS Statistics Version 22. Release 22.0.0. IBM Corporation, 2013.
25R Core Team. R: A Language and Environment for Statistical Computing. R Foundation for Statistical Computing, 2013.
28Costello, AB, Osborne, JW. Best practices in exploratory factor analysis: four recommendations for getting the most from your analysis. Pract Assess Res Eval 2005; 10: 1–9.
29Shakoor, S, McGuire, P, Cardno, A, Freeman, D, Plomin, R, Ronald, A. A shared genetic propensity underlies experiences of bullying victimization in late childhood and self-rated paranoid thinking in adolescence. Schizophr Bull 2015; 41: 754–63.
30Freeman, D, Dunn, G, Startup, H, Pugh, K, Cordwell, J, Mander, H, et al. Effects of cognitive behaviour therapy for worry on persecutory delusions in patients with psychosis (WIT): a parallel, single-blind, randomised controlled trial with a mediation analysis. Lancet Psychiatry 2015; 2: 305–13.
31Freeman, D, Sheaves, B, Goodwin, G, Yu, L-M, Nickless, A, Harrison, P, et al. The effects of improving sleep on mental health (OASIS): a randomised controlled trial with mediation analysis. Lancet Psychiatry 2017; 4: 749–58.
32Freeman, D, Pugh, K, Dunn, G, Evans, N, Sheaves, B, Waite, F, et al. An early phase II randomized controlled trial testing the effect on persecutory delusions of using CBT to reduce negative cognitions about the self. Schizophr Res 2014; 160: 186–92.
33Brown, P, Waite, F, Freeman, D. ‘Twisting the lion's tail’: manipulationist tests of causation for psychological mechanisms in the occurrence of delusions and hallucinations. Clin Psychol Rev 2018; 68: 25–37.
34Freeman, D, Taylor, K, Molodynski, A, Waite, F. Treatable clinical intervention targets for patients with schizophrenia. Schizophr Res 2019; 211: 44–50.