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A systematic review and meta-analysis of the psychosis continuum: evidence for a psychosis proneness–persistence–impairment model of psychotic disorder

  • J. van Os (a1) (a2), R. J. Linscott (a1) (a3), I. Myin-Germeys (a1), P. Delespaul (a1) and L. Krabbendam (a1)...

A systematic review of all reported incidence and prevalence studies of population rates of subclinical psychotic experiences reveals a median prevalence rate of around 5% and a median incidence rate of around 3%. A meta-analysis of risk factors reveals associations with developmental stage, child and adult social adversity, psychoactive drug use, and also male sex and migrant status. The small difference between prevalence and incidence rates, together with data from follow-up studies, indicates that approximately 75–90% of developmental psychotic experiences are transitory and disappear over time. There is evidence, however, that transitory developmental expression of psychosis (psychosis proneness) may become abnormally persistent (persistence) and subsequently clinically relevant (impairment), depending on the degree of environmental risk the person is additionally exposed to. The psychosis proneness–persistence–impairment model considers genetic background factors impacting on a broadly distributed and transitory population expression of psychosis during development, poor prognosis of which, in terms of persistence and clinical need, is predicted by environmental exposure interacting with genetic risk.

Corresponding author
*Address for correspondence: Dr J. van Os, Department of Psychiatry and Neuropsychology, South Limburg Mental Health Research and Teaching Network, EURON, Maastricht University, PO Box 616 (DRT 10), 6200 MD Maastricht, The Netherlands. (Email:
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Agerbo, E, Byrne, M, Eaton, WW, Mortensen, PB (2004). Marital and labor market status in the long run in schizophrenia. Archives of General Psychiatry 61, 2833.
Aleman, A, Nieuwenstein, MR, Böcker, KBE, De Haan, EHF (2001). Multi-dimensionality of hallucinatory predisposition: factor structure of the Launay–Slade Hallucination Scale in a normal sample. Personality and Individual Differences 30, 287292.
Allen, P, Freeman, D, Johns, L, McGuire, P (2006). Misattribution of self-generated speech in relation to hallucinatory proneness and delusional ideation in healthy volunteers. Schizophrenia Research 84, 281288.
Arseneault, L, Cannon, M, Poulton, R, Murray, R, Caspi, A, Moffit, TE (2002). Cannabis use in adolescence and risk for adult psychosis: longitudinal prospective study. British Medical Journal 325, 12121213.
Bak, M, Delespaul, P, Hanssen, M, de Graaf, R, Vollebergh, W, van Os, J (2003). How false are ‘false’ positive psychotic symptoms? Schizophrenia Research 62, 187189.
Bak, M, Myin-Germeys, I, Delespaul, P, Vollebergh, W, de Graaf, R, van Os, J (2005). Do different psychotic experiences differentially predict need for care in the general population? Comprehensive Psychiatry 46, 192199.
Barrett, TR, Etheridge, JB (1992). Verbal hallucinations in normals. I: People who hear voices. Applied Cognitive Psychology 6, 379387.
Bentall, RP, Slade, PD (1985). Reliability of a scale measuring disposition towards hallucinations: a brief report. Personality and Individual Differences 6, 527529.
Bergida, H, Lenzenweger, MF (2006). Schizotypy and sustained attention: confirming evidence from an adult community sample. Journal of Abnormal Psychology 115, 545551.
Brugha, T, Singleton, N, Meltzer, H, Bebbington, P, Farrell, M, Jenkins, R, Coid, J, Fryers, T, Melzer, D, Lewis, G (2005). Psychosis in the community and in prisons: a report from the British National Survey of Psychiatric Morbidity. American Journal of Psychiatry 162, 774780.
Cantor-Graae, E, Selten, JP (2005). Schizophrenia and migration: a meta-analysis and review. American Journal of Psychiatry 162, 1224.
Chapman, LJ, Chapman, JP, Kwapil, TR, Eckblad, M, Zinser, MC (1994). Putatively psychosis-prone subjects 10 years later. Journal of Abnormal Psychology 103, 171183.
Claridge, G (1997). Schizotypy: Implications for Illness and Health. Oxford University Press: Oxford.
Colbert, SM, Peters, ER (2002). Need for closure and jumping-to-conclusions in delusion-prone individuals. Journal of Nervous and Mental Disease 190, 2731.
Collip, D, Myin-Germeys, I, Van Os, J (2008). Does the concept of ‘sensitization’ provide a plausible mechanism for the putative link between the environment and schizophrenia? Schizophrenia Bulletin 34, 220225.
Cougnard, A, Marcelis, M, Myin-Germeys, I, De Graaf, R, Vollebergh, W, Krabbendam, L, Lieb, R, Wittchen, HU, Henquet, C, Spauwen, J, Van Os, J (2007). Does normal developmental expression of psychosis combine with environmental risk to cause persistence of psychosis? A psychosis proneness-persistence model. Psychological Medicine 37, 513527.
Crow, TJ (1998). From Kraepelin to Kretschmer leavened by Schneider. The transition from categories of psychosis to dimensions of variation intrinsic to Homo sapiens. Archives of General Psychiatry 55, 502504.
Degenhardt, L, Hall, W (2001). The association between psychosis and problematical drug use among Australian adults: findings from the National Survey of Mental Health and Well-Being. Psychological Medicine 31, 659668.
Dhossche, D, Ferdinand, R, van der Ende, J, Hofstra, MB, Verhulst, F (2002). Diagnostic outcome of self-reported hallucinations in a community sample of adolescents. Psychological Medicine 32, 619627.
Dinn, WM, Harris, CL, Aycicegi, A, Greene, P, Andover, MS (2002). Positive and negative schizotypy in a student sample: neurocognitive and clinical correlates. Schizophrenia Research 56, 171185.
Driessen, G, Gunther, N, Bak, M, van Sambeek, M, Van Os, J (1998). Characteristics of early- and late-diagnosed schizophrenia: implications for first-episode studies. Schizophrenia Research 33, 2734.
Eaton, WW, Romanoski, A, Anthony, JC, Nestadt, G (1991). Screening for psychosis in the general population with a self-report interview. Journal of Nervous and Mental Disease 179, 689693.
Egan, MF, Goldberg, TE, Gscheidle, T, Weirich, M, Rawlings, R, Hyde, TM, Bigelow, L, Weinberger, DR (2001). Relative risk for cognitive impairments in siblings of patients with schizophrenia. Biological Psychiatry 50, 98107.
Fanous, A, Gardner, C, Walsh, D, Kendler, KS (2001). Relationship between positive and negative symptoms of schizophrenia and schizotypal symptoms in nonpsychotic relatives. Archives of General Psychiatry 58, 669673.
Faraone, SV, Seidman, LJ, Kremen, WS, Pepple, JR, Lyons, MJ, Tsuang, MT (1995). Neuropsychological functioning among the nonpsychotic relatives of schizophrenic patients: a diagnostic efficiency analysis. Journal of Abnormal Psychology 104, 286304.
Ferdinand, RF, van der Ende, J, Verhulst, FC (2004). Associations between visual and auditory hallucinations in children and adolescents, and tobacco use in adulthood. Social Psychiatry and Psychiatric Epidemiology 39, 514520.
Fergusson, DM, Horwood, LJ, Ridder, EM (2005). Tests of causal linkages between cannabis use and psychotic symptoms. Addiction 100, 354366.
Fergusson, DM, Horwood, LJ, Swain-Campbell, NR (2003). Cannabis dependence and psychotic symptoms in young people. Psychological Medicine 33, 1521.
Goodwin, RD, Fergusson, DM, Horwood, LJ (2003). Neuroticism in adolescence and psychotic symptoms in adulthood. Psychological Medicine 33, 10891097.
Gruzelier, JH (1996). The factorial structure of schizotypy. Part I. Affinities with syndromes of schizophrenia. Schizophrenia Bulletin 22, 611620.
Hanssen, M, Bak, M, Bijl, R, Vollebergh, W, van Os, J (2005). The incidence and outcome of subclinical psychotic experiences in the general population. British Journal of Clinical Psychology 44, 181191.
Hanssen, M, Krabbendam, L, Vollema, M, Delespaul, P, Van Os, J (2006). Evidence for instrument and family-specific variation of subclinical psychosis dimensions in the general population. Journal of Abnormal Psychology 115, 514.
Henderson, AS, Korten, AE, Levings, C, Jorm, AF, Christensen, H, Jacomb, PA, Rodgers, B (1998). Psychotic symptoms in the elderly: a prospective study in a population sample. International Journal of Geriatric Psychiatry 13, 484492.
Henquet, C, Murray, R, Linszen, D, van Os, J (2005). The environment and schizophrenia: the role of cannabis use. Schizophrenia Bulletin 31, 608612.
Janssen, I, Hanssen, M, Bak, M, Bijl, RV, de Graaf, R, Vollebergh, W, McKenzie, K, van Os, J (2003). Discrimination and delusional ideation. British Journal of Psychiatry 182, 7176.
Janssen, I, Krabbendam, L, Bak, M, Hanssen, M, Vollebergh, W, de Graaf, R, van Os, J (2004). Childhood abuse as a risk factor for psychotic experiences. Acta Psychiatrica Scandinavica 190, 3845.
Janssen, I, Versmissen, D, Campo, JA, Myin-Germeys, I, van Os, J, Krabbendam, L (2006). Attribution style and psychosis: evidence for an externalizing bias in patients but not in individuals at high risk. Psychological Medicine 36, 771778.
Johns, LC, Cannon, M, Singleton, N, Murray, RM, Farrell, M, Brugha, T, Bebbington, P, Jenkins, R, Meltzer, H (2004). Prevalence and correlates of self-reported psychotic symptoms in the British population. British Journal of Psychiatry 185, 298305.
Johns, LC, Nazroo, JY, Bebbington, P, Kuipers, E (2002). Occurrence of hallucinatory experiences in a community sample and ethnic variations. British Journal of Psychiatry 180, 174178.
Johns, LC, van Os, J (2001). The continuity of psychotic experiences in the general population. Clinical Psychology Review 21, 11251141.
Johnson, JK, Tuulio-Henriksson, A, Pirkola, T, Huttunen, MO, Lonnqvist, J, Kaprio, J, Cannon, TD (2003). Do schizotypal symptoms mediate the relationship between genetic risk for schizophrenia and impaired neuropsychological performance in co-twins of schizophrenic patients? Biological Psychiatry 54, 12001204.
Jones, P, Rodgers, B, Murray, R, Marmot, M (1994 a). Child development risk factors for adult schizophrenia in the British 1946 birth cohort. Lancet 344, 13981402.
Jones, PB, Harvey, I, Lewis, SW, Toone, BK, Van Os, J, Williams, M, Murray, RM (1994 b). Cerebral ventricle dimensions as risk factors for schizophrenia and affective psychosis: an epidemiological approach to analysis. Psychological Medicine 24, 9951011.
Kendler, KS, Gallagher, TJ, Abelson, JM, Kessler, RC (1996). Lifetime prevalence, demographic risk factors, and diagnostic validity of nonaffective psychosis as assessed in a US community sample. The National Comorbidity Survey. Archives of General Psychiatry 53, 10221031.
Kendler, KS, Gardner, CO (1997). The risk for psychiatric disorders in relatives of schizophrenic and control probands: a comparison of three independent studies. Psychological Medicine 27, 411419.
Kendler, KS, Hewitt, J (1992). The structure of self-report schizotypy in twins. Journal of Personality Disorders 6, 117.
Kendler, KS, McGuire, M, Gruenberg, AM, O'Hare, A, Spellman, M, Walsh, D (1993). The Roscommon Family Study. III. Schizophrenia-related personality disorders in relatives. Archives of General Psychiatry 50, 781788.
Kessler, RC, Birnbaum, H, Demler, O, Falloon, IR, Gagnon, E, Guyer, M, Howes, MJ, Kendler, KS, Shi, L, Walters, E, Wu, EQ (2005). The prevalence and correlates of nonaffective psychosis in the National Comorbidity Survey Replication (NCS-R). Biological Psychiatry 58, 668676.
Kety, SS, Rosenthal, D, Wender, PH, Schulsinger, F (1971). Mental illness in the biological and adoptive families of adopted schizophrenics. American Journal of Psychiatry 128, 8286.
Kitamura, T, Okazaki, Y, Fujinawa, A, Yoshino, M, Kasahara, Y (1995). Symptoms of psychoses. A factor-analytic study. British Journal of Psychiatry 166, 236240.
Konings, M, Bak, M, Hanssen, M, van Os, J, Krabbendam, L (2006). Validity and reliability of the CAPE: a self-report instrument for the measurement of psychotic experiences in the general population. Acta Psychiatrica Scandinavica 114, 5561.
Krabbendam, L, Marcelis, M, Delespaul, P, Jolles, J, van Os, J (2001). Single or multiple familial cognitive risk factors in schizophrenia? American Journal of Medical Genetics 105, 183188.
Krabbendam, L, Myin-Germeys, I, De Graaf, R, Vollebergh, W, Nolen, WA, Iedema, J, Van Os, J (2004). Dimensions of depression, mania and psychosis in the general population. Psychological Medicine 34, 11771186.
Krabbendam, L, Myin-Germeys, I, Hanssen, M, van Os, J (2005). Familial covariation of the subclinical psychosis phenotype and verbal fluency in the general population. Schizophrenia Research 74, 3741.
Krabbendam, L, van Os, J (2005). Schizophrenia and urbanicity: a major environmental influence – conditional on genetic risk. Schizophrenia Bulletin 31, 795799.
Kwapil, TR (1998). Social anhedonia as a predictor of the development of schizophrenia-spectrum disorders. Journal of Abnormal Psychology 107, 558565.
Langdon, R, Coltheart, M (1999). Mentalising, schizotypy, and schizophrenia. Cognition 71, 4371.
Langdon, R, Coltheart, M (2004). Recognition of metaphor and irony in young adults: the impact of schizotypal personality traits. Psychiatry Research 125, 920.
Laroi, F, Collignon, O, Van der Linden, M (2005). Source monitoring for actions in hallucination proneness. Cognitive Neuropsychiatry 10, 105123.
Laroi, F, Marczewski, P, Van der Linden, M (2004). Further evidence of the multi-dimensionality of hallucinatory predisposition: factor structure of a modified version of the Launay–Slade Hallucinations Scale in a normal sample. European Psychiatry 19, 1520.
Laurens, KR, Hodgins, S, Maughan, B, Murray, RM, Rutter, ML, Taylor, EA (2007). Community screening for psychotic-like experiences and other putative antecedents of schizophrenia in children aged 9–12 years. Schizophrenia Research 90, 130146.
Lenzenweger, MF, Gold, JM (2000). Auditory working memory and verbal recall memory in schizotypy. Schizophrenia Research 42, 101110.
Lenzenweger, MF, Korfine, L (1994). Perceptual aberrations, schizotypy, and the Wisconsin Card Sorting Test. Schizophrenia Bulletin 20, 345357.
Levine, E, Jonas, H, Serper, MR (2004). Interpersonal attributional biases in hallucinatory-prone individuals. Schizophrenia Research 69, 2328.
Lewandowski, KE, Barrantes-Vidal, N, Nelson-Gray, RO, Clancy, C, Kepley, HO, Kwapil, TR (2006). Anxiety and depression symptoms in psychometrically identified schizotypy. Schizophrenia Research 83, 225235.
Lieb, R, Isensee, B, von Sydow, K, Wittchen, HU (2000). The Early Developmental Stages of Psychopathology Study (EDSP): a methodological update. European Addiction Research 6, 170182.
Líndal, E, Stefánsson, JG, Stefánsson, SB (1994). The qualitative difference of visions and visual hallucinations: a comparison of a general-population and clinical sample. Comprehensive Psychiatry 35, 405408.
Linney, YM, Murray, RM, Peters, ER, MacDonald, AM, Rijsdijk, F, Sham, PC (2003). A quantitative genetic analysis of schizotypal personality traits. Psychological Medicine 33, 803816.
Linney, YM, Peters, ER, Ayton, P (1998). Reasoning biases in delusion-prone individuals. British Journal of Clinical Psychology 37, 285302.
López-Ilundain, JM, Pérez-Nievas, F, Otero, M, Mata, I (2006). Peters' Delusions Inventory in Spanish general population: internal reliability, factor structure and association with demographic variables (dimensionality of delusional ideation). Actas Espanolas de Psiquiatria 34, 94104.
MacDonald, AW, Pogue-Geile, MF, Debski, TT, Manuck, S (2001). Genetic and environmental influences on schizotypy: a community-based twin study. Schizophrenia Bulletin 27, 4758.
Maric, N, Krabbendam, L, Vollebergh, W, de Graaf, R, van Os, J (2003). Sex differences in symptoms of psychosis in a non-selected, general population sample. Schizophrenia Research 63, 8995.
Marjoram, D, Miller, P, McIntosh, AM, Owens, DGC, Johnstone, EC, Lawrie, S (2006). A neuropsychological investigation into ‘Theory of Mind’ and enhanced risk of schizophrenia. Psychiatry Research 144, 2937.
Mata, I, Gilvarry, CM, Jones, PB, Lewis, SW, Murray, RM, Sham, PC (2003). Schizotypal personality traits in nonpsychotic relatives are associated with positive symptoms in psychotic probands. Schizophrenia Bulletin 29, 273283.
Matsui, M, Sumiyoshi, T, Kato, K, Yoneyama, E, Kurachi, M (2004). Neuropsychological profile in patients with schizotypal personality disorder or schizophrenia. Psychological Reports 94, 387397.
McGee, R, Williams, S, Poulton, R (2000). Hallucinations in nonpsychotic children. Journal of the American Academy of Child and Adolescent Psychiatry 39, 1213.
McGorry, PD, Bell, RC, Dudgeon, PL, Jackson, HJ (1998). The dimensional structure of first episode psychosis: an exploratory factor analysis. Psychological Medicine 28, 935947.
McGorry, PD, McFarlane, C, Patton, GC, Bell, R, Hibbert, ME, Jackson, HJ, Bowes, G (1995). The prevalence of prodromal features of schizophrenia in adolescence: a preliminary survey. Acta Psychiatrica Scandinavica 92, 241249.
McGrath, J, Saha, S, Welham, J, El Saadi, O, MacCauley, C, Chant, D (2004). A systematic review of the incidence of schizophrenia: the distribution of rates and the influence of sex, urbanicity, migrant status and methodology. BMC Medicine 2, 13.
McKay, R, Langdon, R, Coltheart, M (2005). Paranoia, persecutory delusions and attributional biases. Psychiatry Research 136, 233245.
Meehl, PE (1962). Schizotaxia, schizotypy, schizophrenia. American Psychologist 17, 827838.
Mojtabi, R (2006). Psychotic-like experiences and interpersonal violence in the general population. Social Psychiatry and Psychiatric Epidemiology 41, 183190.
Neumann, CS, Walker, EF (2003). Neuromotor functioning in adolescents with schizotypal personality disorder: associations with symptoms and neurocognition. Schizophrenia Bulletin 29, 285298.
Ohayon, MM, Schatzberg, AF (2002). Prevalence of depressive episodes with psychotic features in the general population. American Journal of Psychiatry 159, 18551861.
Olfson, M, Lewis-Fernandez, R, Weissman, MM, Feder, A, Gameroff, MJ, Pilowsky, D, Fuentes, M (2002). Psychotic symptoms in an urban general medicine practice. American Journal of Psychiatry 159, 14121419.
Olfson, M, Weissman, MM, Leon, AC, Farber, L, Sheehan, DV (1996). Psychotic symptoms in primary care. Journal of Family Practice 43, 481488.
Owens, DG, Johnstone, EC (2006). Precursors and prodromata of schizophrenia: findings from the Edinburgh High Risk Study and their literature context. Psychological Medicine 36, 15011514.
Park, S, Holzman, PS, Lenzenweger, MF (1995). Individual differences in spatial working memory in relation to schizotypy. Journal of Abnormal Psychology 104, 355363.
Peters, E, Day, S, McKenna, J, Orbach, G (1999 a). Delusional ideation in religious and psychotic populations. British Journal of Clinical Psychology 38, 8396.
Peters, E, Joseph, S, Day, S, Garety, P (2004). Measuring delusional ideation: the 21-item Peters et al. Delusions Inventory (PDI). Schizophrenia Bulletin 30, 10051022.
Peters, ER, Joseph, SA, Garety, PA (1999 b). Measurement of delusional ideation in the normal population: introducing the PDI (Peters et al. Delusions Inventory). Schizophrenia Bulletin 25, 553576.
Pickup, GJ (2006). Theory of mind and its relation to schizotypy. Cognitive Neuropsychiatry 11, 177192.
Posey, TB, Losch, ME (1983). Auditory hallucinations of hearing voices in 375 normal subjects. Imagination, Cognition, and Personality 3, 99113.
Poulton, R, Caspi, A, Moffitt, TE, Cannon, M, Murray, R, Harrington, H (2000). Children's self-reported psychotic symptoms and adult schizophreniform disorder: a 15-year longitudinal study. Archives of General Psychiatry 57, 10531058.
Raine, A (2006). Schizotypal personality: neurodevelopmental and psychosocial trajectories. Annual Revue of Clinical Psychology 2, 291326.
Read, J, van Os, J, Morrison, AP, Ross, CA (2005). Childhood trauma, psychosis and schizophrenia: a literature review with theoretical and clinical implications. Acta Psychiatrica Scandinavica 112, 330350.
Ross, CA, Joshi, S (1992). Schneiderian symptoms and childhood trauma in the general population. Comprehensive Psychiatry 33, 269273.
Ross, CA, Joshi, S, Currie, R (1990). Dissociative experiences in the general population. American Journal of Psychiatry 147, 15471552.
Rössler, W, Riecher-Rössler, A, Angst, J, Murray, R, Gamma, A, Eich, D, van Os, J, Gross, VA (2007). Psychotic experiences in the general population: a twenty-year prospective community study. Schizophrenia Research, 92, 114.
Saha, S, Chant, D, McGrath, J (2008). Meta-analyses of the incidence and prevalence of schizophrenia: conceptual and methodological issues. International Journal of Methods in Psychiatric Research 17, 5561.
Schwab, ME (1977). A study of reported hallucinations in a Southeastern county. Mental Health and Society 4, 344354.
Scott, J, Chant, D, Andrews, G, McGrath, J (2006). Psychotic-like experiences in the general community: the correlates of CIDI psychosis screen items in an Australian sample. Psychological Medicine 36, 231238.
Serper, M, Dill, CA, Chang, N, Kot, T, Elliot, J (2005). Factorial structure of the hallucinatory experience: continuity of experience in psychotic and normal individuals. Journal of Nervous and Mental Disease 193, 265272.
Shevlin, M, Murphy, J, Dorahy, MJ, Adamson, G (2007). The distribution of positive psychosis-like symptoms in the population: a latent class analysis of the National Comorbidity Survey. Schizophrenia Research 89, 101109.
Siever, LJ, Davis, KL (2004). The pathophysiology of schizophrenia disorders: perspectives from the spectrum. American Journal of Psychiatry 161, 398413.
Siever, LJ, Kalus, OF, Keefe, RS (1993). The boundaries of schizophrenia. Psychiatric Clinics of North America 16, 217244.
Simons, CJ, Jacobs, N, Jolles, J, van Os, J, Krabbendam, L (2007). Subclinical psychotic experiences and cognitive functioning as a bivariate phenotype for genetic studies in the general population. Schizophrenia Research 92, 2431.
Sitskoorn, MM, Aleman, A, Ebisch, SJ, Appels, MC, Kahn, RS (2004). Cognitive deficits in relatives of patients with schizophrenia: a meta-analysis. Schizophrenia Research 71, 285295.
Spauwen, J, Krabbendam, L, Lieb, R, Wittchen, HU, van Os, J (2003). Sex differences in psychosis: normal or pathological? Schizophrenia Research 62, 4549.
Spauwen, J, Krabbendam, L, Lieb, R, Wittchen, HU, van Os, J (2004). Does urbanicity shift the population expression of psychosis? Journal of Psychiatric Research 38, 613618.
Spauwen, J, Krabbendam, L, Lieb, R, Wittchen, HU, van Os, J (2006 a). Evidence that the outcome of developmental expression of psychosis is worse for adolescents growing up in an urban environment. Psychological Medicine 36, 407415.
Spauwen, J, Krabbendam, L, Lieb, R, Wittchen, HU, van Os, J (2006 b). Impact of psychological trauma on the development of psychotic symptoms: relationship with psychosis proneness. British Journal of Psychiatry 188, 527533.
StataCorp (2007). STATA Statistical Software: Release 10.0. College Station: Texas.
Stefanis, NC, Delespaul, P, Smyrnis, N, Lembesi, A, Avramopoulos, DA, Evdokimidis, IK, Stefanis, CN, van Os, J (2004). Is the excess risk of psychosis-like experiences in urban areas attributable to altered cognitive development? Social Psychiatry and Psychiatric Epidemiology 39, 364368.
Stefanis, NC, Hanssen, M, Smirnis, NK, Avramopoulos, DA, Evdokimidis, IK, Stefanis, CN, Verdoux, H, van Os, J (2002). Evidence that three dimensions of psychosis have a distribution in the general population. Psychological Medicine 32, 347358.
Stueve, A, Link, BG (1998). Gender differences in the relationship between mental illness and violence: evidence from a community-based epidemiological study in Israel. Social Psychiatry and Psychiatric Epidemiology 33, S61S67.
Tien, AY (1991). Distributions of hallucinations in the population. Social Psychiatry and Psychiatric Epidemiology 26, 287292.
Tien, AY, Anthony, JC (1990). Epidemiological analysis of alcohol and drug use as risk factors for psychotic experiences. Journal of Nervous and Mental Disease 178, 473480.
Tien, AY, Eaton, WW (1992). Psychopathologic precursors and sociodemographic risk factors for the schizophrenia syndrome. Archives of General Psychiatry 49, 3746.
van Dael, F, Versmissen, D, Janssen, I, Myin-Germeys, I, van Os, J, Krabbendam, L (2006). Data gathering: biased in psychosis. Schizophrenia Bulletin 32, 341351.
van Os, J, Hanssen, M, Bak, M, Bijl, RV, Vollebergh, W (2003). Do urbanicity and family liability coparticipate in causing psychosis? American Journal of Psychiatry 160, 477482.
van Os, J, Hanssen, M, Bijl, R-V, Ravelli, A (2000). Straus (1969) revisited: a psychosis continuum in the general population? Schizophrenia Research 45, 1120.
van Os, J, Hanssen, M, Bijl, RV, Vollebergh, W (2001). Prevalence of psychotic disorder and community level of psychotic symptoms: an urban–rural comparison. Archives of General Psychiatry 58, 663668.
Vega, WA, Sribney, WM, Miskimen, TM, Escobar, JI, Aguilar-Gaxiola, S (2006). Putative psychotic symptoms in the Mexican American population: prevalence and co-occurrence with psychiatric disorders. Journal of Nervous and Mental Disease 194, 471477.
Verdoux, H, Maurice-Tison, S, Gay, B, van Os, J, Salamon, R, Bourgeois, ML (1998 a). A survey of delusional ideation in primary-care patients. Psychological Medicine 28, 127134.
Verdoux, H, van Os, J, Maurice-Tison, S, Gay, B, Salamon, R, Bourgeois, M (1998 b). Is early adulthood a critical developmental stage for psychosis proneness? A survey of delusional ideation in normal subjects. Schizophrenia Research 29, 247254.
Versmissen, D, Janssen, I, Johns, L, McGuire, P, Drukker, M, Campo, J, Myin-Germeys, I, van Os, J, Krabbendam, L (2007 a). Verbal self-monitoring in psychosis: a non-replication. Psychological Medicine 37, 569576.
Versmissen, D, Myin-Germeys, I, Janssen, I, Franck, N, Georgieff, N, a Campo, J, van Os, J, Krabbendam, L (2007 b). Impairment of self-monitoring: part of the endophenotypic risk for psychosis. British Journal of Psychiatry 51 (Suppl.), S58S62.
Voglmaier, MM, Seidman, LJ, Niznikiewicz, MA, Dickey, CC, Shenton, ME, McCarley, RW (2000). Verbal and nonverbal neuropsychological test performance in subjects with schizotypal personality disorder. American Journal of Psychiatry 157, 787793.
Vollema, MG, Hoijtink, H (2000). The multidimensionality of self-report schizotypy in a psychiatric population: an analysis using multidimensional Rasch models. Schizophrenia Bulletin 26, 565575.
Vollema, MG, Sitskoorn, MM, Appels, MC, Kahn, RS (2002). Does the Schizotypal Personality Questionnaire reflect the biological-genetic vulnerability to schizophrenia? Schizophrenia Research 54, 3945.
Vollema, MG, van den Bosch, RJ (1995). The multidimensionality of schizotypy. Schizophrenia Bulletin 21, 1931.
Wiles, NJ, Zammit, S, Bebbington, P, Singleton, N, Meltzer, H, Lewis, G (2006). Self-reported psychotic symptoms in the general population: results from the longitudinal study of the British National Psychiatric Morbidity Survey. British Journal of Psychiatry 188, 519526.
Wittchen, HU, Perkonigg, A, Lachner, G, Nelson, CB (1998). Early developmental stages of psychopathology study (EDSP): objectives and design. European Addiction Research 4, 1827.
Wolfradt, U, Straube, ER (1998). Factor structure of schizotypal traits among adolescents. Personality and Individual Differences 24, 201206.
Yoshizumi, T, Murase, S, Honjo, S, Kaneko, H, Murakami, T (2004). Hallucinatory experiences in a community sample of Japanese children. Journal of the American Academy of Child and Adolescent Psychiatry 43, 10301036.
Yung, AR, Phillips, LJ, Yuen, HP, Francey, SM, McFarlane, CA, Hallgren, M, McGorry, PD (2003). Psychosis prediction: 12-month follow up of a high-risk (‘prodromal’) group. Schizophrenia Research 60, 2132.
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