Less words, more words: psychometric schizotypy and verbal fluency

Tsakanikos, Dr Elias and Claridge, Professor Gordon (2004) Less words, more words: psychometric schizotypy and verbal fluency. [Preprint]

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Positive and negative symptoms of schizophrenia have been differentially associated with irregularities in verbal production, suggesting the involvement of different underlying mechanisms in psychotic symptomatology. In view of that, the present investigation examined whether the amount of verbal production would be also differentially associated with negative and positive symptoms of psychometric schizotypy in a sample of college students (N=190). The participants were tested on a typical verbal fluency test and completed the O-LIFE schizotypy scales. The analyses revealed that decreased verbal fluency was associated with increased levels of negative schizotypy in participants who scored one standard deviation above the mean on the ‘Introvertive Anhedonia’ scale. In contrast, increased verbal fluency was associated with increased levels of positive schizotypy in participants who scored one standard deviation above the mean on the ‘Unusual Experiences’ scale. The obtained results are discussed in terms of the proposal that psychotic-like unusual experiences, like hallucinations, may be the product of a higher automatic spreading activation among stored lexical units, a mechanism which seems to account for the previously reported link between positive schizotypy and creativity.

Item Type:Preprint
Keywords:automatic spreading activation; creativity; executive functioning; hallucinations; phonological (letter) fluency; positive/negative schizotypy; individual differences in speech production
Subjects:Neuroscience > Neuropsychology
Neuroscience > Neuropsychiatry
Psychology > Cognitive Psychology
ID Code:3817
Deposited By: Tsakanikos, E.
Deposited On:06 Oct 2004
Last Modified:11 Mar 2011 08:55

References in Article

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Allen, H. A., Liddle, P. F., & Frith, C. D. (1993). Negative features, retrieval processes and verbal fluency in schizophrenia. British Journal of Psychiatry, 163, 769–775.

Barrantes-Vidal, N., Fananas, L., Rosa, A., Caparros, B., Riba, M. D., & Obiols, J. E. (2002). Neurocognitive, behavioural and neurodevelopmental correlates of schizotypy clusters in adolescents from the general population. Schizophrenia Research, 61, 293–302.

Beatty, W. W., Goodkin, D. E., & Beatty, P. A. (1989). Frontal lobe dysfunction and memory impairment in patients with chronic progressive multiple sclerosis. Brain and Cognition, 11, 73–86.

Bentall, R. P., Claridge, G., & Slade, P. D. (1989). The multidimensional nature of schizotypal traits: a factor analytic study with normal subjects. British Journal of Clinical Psychology, 28, 363–375.

Crow, S. F. (1992). Dissociation of two frontal lobe syndromes by a test for verbal fluency. Journal of Clinical and Experimental Neuropsychology, 14, 327–339.

Claridge, G. (1997). Schizotypy: theoretical background and issues. In G. Claridge (Ed.), Schizotypy: implications for illness and health (pp. 3–18). Oxford: Oxford University Press.

David, A. S. (1994). The neuropsychological origins of auditory hallucinations. In A. S. David & J. Cutting (Eds), Neuropsychology of Schizophrenia (pp. 269–313). Hillsdale, NJ: Lawrence Erlbaum Associates.

Eysenck, H. J. (1993). Creativity and personality: suggestions for a theory. Psychological Inquiry, 4, 147–178.

Eysenck, H. J., & Eysenck, S. B. G. (1975). Manual of the Eysenck Personality Questionnaire. London: Hodder and Stoughton.

Dinn, W. M., Harris, C. L., Aycicegi, A., Greene, P. & Andover, M. S. (2002). Positive and negative schizotypy in a student sample: neuro-cognitive and clinical correlates. Schizophrenia Research, 56, 171–185.

Harvey, P. D. (2000). Formal thought disorder in schizophrenia: characteristics and cognitive underpinnings. In S. Tommoy & P. D. Harvey (Eds.), Cognition in Schizophrenia: Impairments, Importance and Treatment Strategies (pp. 107–125). New York: Oxford University Press.

Harvey, P. D., Lenzenweger, M. F., Keefe, R. S. E., Pogge, D. L., Serper, M. R., & Mohs, R. C. (1992). Empirical evaluation of the factorial structure of clinical symptoms in schizophrenia. Psychiatry Research, 44, 141–151.

Hoffman, R. E., & McGlashan, T. H. (1997). Synaptic elimination, neurodevelopment, and the mechanism of hallucinated `voices' in schizophrenia. American Journal of Psychiatry, 154, 1683–1689.

Howanitz, E., Cicalese, C. & Harvey, P. D. (2000). Verbal fluency and psychiatric symptoms in geriatric schizophrenia. Schizophrenia Research, 42, 167–169.

Joyce, E. M., & Robbins, T. W. (1991). Frontal lobe functioning in Korsakoff and non-Korsakoff alcoholics: planning and spatial working memory. Neuropsychologia, 29, 709–723.

Kerns, J. G., Berenbaum, H., Barch, D. M., Banich, M. T., & Stolar, N., 1999. Word production in schizophrenia and its relationship to positive symptoms. Psychiatry Research, 87, 29–37.

Lezak, M. (1995). Neuropsychological Assessment. Oxford: Oxford University Press.

Lindamer, L. A., & Whitman, R. D. (1997). Frontal lobe functioning and communication deficits as a function of positive and negative symptoms in schizophrenia. Archives of Clinical Neuropsychology, 12, 358–359.

Mason, O., Claridge, G., & Jackson, M. (1995). New scales for the assessment of schizotypy. Personality and Individual Differences, 18, 7–13.

McCreery, C., & Claridge, G. (2002). Healthy schizotypy: the case of out-of-the-body experiences. Personality and Individual Differences, 32, 141–154.

O’Reilly, T., Dunbar, R., & Bentall, R. (2001). Schizotypy and creativity: an evolutionary connection? Personality and Individual Differences, 31, 1067–1068.

Rawlings, D., & Goldberg, M. (2001). Correlating a measure of sustained attention with a multidimensional measure of schizotypal traits. Personality and Individual-Differences, 31, 421–431.

Spitzer, M. (1993). The psychopathology, neuropsychology, and neurobiology of associative and working memory in schizophrenia. European Archives of Psychiatry and Clinical Neuroscience, 243, 57–70.

Steel, C., Hemsley, D. R., & Jones, S. (1996). Cognitive inhibition and schizotypy as measured by the Oxford-Liverpool Inventory of Feelings and Experiences. Personality and Individual Differences, 20, 769–773.

Tsakanikos, E., & Reed, P. (2003). Visuo-spatial perceptual processing and dimensions of schizotypy: figure-ground segregation as a function of psychotic-like features. Personality and Individual Differences, 35, 703–712.

Weinstein, S., & Graves, R. E. (2002). Are creativity and schizotypy products of a right hemisphere bias? Brain and Cognition, 49, 138–151.


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