Logical reasoning in schizotypal personality

Tsakanikos, Elias (2004) Logical reasoning in schizotypal personality. [Journal (Paginated)]

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It was examined whether psychotic-like personality traits in a sample of 205 college students could predict logical reasoning deficits, akin to those seen in schizophrenia. The participants were tested on their ability to assess the logical validity of premises (Logical Reasoning Task), and completed a multi-dimensional schizotypy inventory (O-LIFE). Low accuracy was associated with increased levels of disorganized schizotypy (‘Cognitive Disorganization’), while elevated errors were associated with increased levels of positive (‘Unusual Experiences’), negative (‘Introvertive Anhedonia’) and impulsive (‘Impulsivity Non-conformity’) schizotypy. Nevertheless, multiple regression analyses revealed that negative schizotypy was retained as the only significant predictor after performance was corrected for random guessing, and the contribution of the average amount of time spent on each premise was controlled. The results suggest that, although most schizotypy dimensions have a detrimental effect on reasoning performance, possibly due to disadvantageous test-taking strategies, negative schizotypy is the most reliable predictor of logical reasoning deficits. It is proposed that social/interpersonal schizotypal traits, like negative symptoms of schizophrenia, are accompanied by deficient executive functions of working memory, which appear to undermine, inter alia, logical reasoning processing.

Item Type:Journal (Paginated)
Keywords:executive functions; impulsivity; logical reasoning; negative schizotypy; schizophrenia; social/interpersonal deficits; working memory;
Subjects:Neuroscience > Neuropsychology
Psychology > Clinical Psychology
ID Code:4270
Deposited By: Tsakanikos, E.
Deposited On:21 Apr 2005
Last Modified:11 Mar 2011 08:55

References in Article

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Baddeley, A. D. (1968). A 3 min reasoning test based on grammatical transformation. Psychonomic Science, 10(10), 341-342.

Baddeley, A. D. (1986). Working memory. Oxford: Clarendon Press.

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(4), 363-375.

Burch, G. S., Steel, C., & Hemsley, D. R. (1998). Oxford–Liverpool Inventory of Feelings and Experiences: reliability in an experimental population. British Journal of Clinical Psychology, 37, 107-108.

Butler, R. W., Jenkins, M. A., Sprock, J., & Braff, D. L. (1992). Wisconsin Card Sorting Test deficits in chronic paranoid schizophrenia: evidence for a relatively discrete subgroup? Schizophrenia Research, 7(2), 169-176.

Claridge, G., & Broks, P. (1984). Schizotypy and hemisphere function - I: theoretical consideration and the measurement of schizotypy. Personality and Individual Differences, 5(6), 633-648.

Dickman, S. J. (2000). Impulsivity, arousal and attention. Personality and Individual Differences, 28(3), 563-581.

Ekstrom, R. B., French, J. W., Harman, H. H., & Dermen, D. (1976). Kit of factor referenced cognitive tests. Princeton, N.J.: Educational Testing Service.

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

Goel, V., Bartolo, A., St. Clair, D., & Venneri, A. (in press). Logical reasoning deficits in schizophrenia. Schizophrenia Research.

Goldberg, T. E., Weinberger, D.R., Berman, K.F., Pliskin, N.H., & Podd, M.H. (1987). Further evidence for dementia of the prefrontal type in schizophrenia? A controlled study of teaching the Wisconsin Card Sorting Test performance in schizophrenia. Archives of General Psychiatry, 44, 1008-14.

Goldman-Rakic, P. S. (1994). Working memory dysfunction in schizophrenia. Journal of Neuropsychiatry and Clinical Neuroscience, 6, 348-57.

Goodarzi, M. A., Wykes, T., & Hemsley, D. R. (2000). Cerebral lateralization of global-local processing in people with schizotypy. Schizophrenia Research, 45, 115-121.

Glicksohn, J., Alon, A., Perlmutter, A., Purisman, R. (2001). Symbolic and syncretic cognition among schizophrenics and visual artists. Creativity Research Journal, 13, 133-143.

Lezak, M. (1995). Neuropsychological assessment (3rd ed.). Oxford : OUP

Liddle, P. (1987). The symptoms of chronic schizophrenia: a re-examination of the positive negative dichotomy. British Journal of Psychiatry, 151, 221-234.

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

Mujica-Parodi, L. R., Malaspina, D., & Sackeim, H. A. (2000). Logical processing, affect, and delusional thought in schizophrenia. Harvard Review of Psychiatry, 8, 73-83.

Oaksford, M., & Sellen, J. (2000). Paradoxical individual differences in conditional inference. Behavioral and Brain Sciences, 23, 691-692.

Poreh, A. M., Ross, T. P., & Whitman, R. D. (1995). Re-examination of executive functions in psychosis-prone college students. Personality and Individual Differences, 18, 535-539.

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.

Riley, E. M., McGovern, D., Mockler, D., Doku, V. C., O’Ceallaigh, S., & Fannon, D.G. (2000). Neuropsychological functioning in first-episode psychosis–evidence of specific deficits. Schizophrenia Research, 43, 47-55.

Schweizer, K. (2002). Does impulsivity influence performance in reasoning? Personality and Individual Differences, 33, 1031-1043.

Suhr, J. A. (1997). Executive functioning deficits in hypothetically psychosis-prone college students. Schizophrenia Research, 27, 29-35.

Tallent, K. A., & Gooding, D. C. (1999). Working memory and Wisconsin Card Sorting Test performance in schizotypic individuals: a replication and extension. Psychiatry Research, 89,161-170.

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

Vollema, M. G., & van den Bosch, R. J. (1995). The multidimensionality of schizotypy. Schizophrenia Bulletin, 21, 19-31.

Von Domarus, E. (1944). The specific laws of logic in schizophrenia. In J. Kasanin (Ed.), Language and Thought in Schizophrenia. Berkeley: University of California Press.

Voruganti, L. N. P., Heslegrave, R.J., & Awad, A. G. (1997). Neurocognitive correlates of positive and negative syndromes in schizophrenia. Canadian Journal of Psychiatry, 42, 1066-1071.

Watson, C.G., & Wold, J. (1981). Logical reasoning deficits in schizophrenia and brain damage. Journal of Clinical Psychology, 37, 466-471.

Watson, C. G., Wold, J., & Kucala, T. (1976). A comparison of abstractive and nonabstractive deficits in schizophrenics and psychiatric controls. Journal of Nervous and Mental Disease, 163, 193-199.

Williams, E. B. (1964). Deductive reasoning in schizophrenia. Journal of Abnormal and Social Psychology, 69, 47-61.


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