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Psychoticism was the third personality trait in the Eysenck personality model. Psychometrically, the personality factor emerged orthogonal to the neuroticism (Bech 2017a) and extraversion-introversion (Bech 2017b) factors in the Eysenck factor analysis. Whereas the neuroticism dimension when associated with introversion identified dysthymia (or depression), the association between neuroticism and extraversion identified cyclothymia (or bipolarity).
The psychoticism dimension was finally incorporated in the Eysenck Personality Questionnaire (H. J. Eysenck and Eysenck 1975) with most justification in this regard provided in their “Psychoticism as dimension of personality” (H. J. Eysenck and Eysenck 1976). However, Eysenck et al. (1985) later on revised the EPQ, especially due to problems with the 25-item psychoticism subscale in the 1975 version. This resulted in a 32-item version of the psychoticism subscale in the EPQ-R. Table 1shows...
References
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Bech, P. (2016). Psychoticism (Eysenck’s Theory). In: Zeigler-Hill, V., Shackelford, T. (eds) Encyclopedia of Personality and Individual Differences. Springer, Cham. https://doi.org/10.1007/978-3-319-28099-8_1103-1
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DOI: https://doi.org/10.1007/978-3-319-28099-8_1103-1
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