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Eysenck’s “gigantic three” theory of personality is one of the most influential and controversial theories in psychology, hypothesising that personality can be grouped into three dimensions –extroversion/ introversion, neuroticism and psychotocism  

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Level 3 Practical - P. Burgess March 2005 EYSENCK'S THREE DIMENSIONS: AN INVESTIGATION OF NORMALITY, ORTHOGONALITY AND UNITY Matriculation number: 040012150 Abstract Eysenck's "gigantic three" theory of personality is one of the most influential and controversial theories in psychology, hypothesising that personality can be grouped into three dimensions -extroversion/ introversion, neuroticism and psychotocism. Eysenck claimed that these three dimensions should satisfy three assumptions - they should be normally distributed, orthogonal and unitary. The purpose of this study is to determine how far data we collect will satisfy these assumptions. Results showed that the normality of the distribution was found to be partially supported - extroversion/ introversion and neuroticism were found to be normally distributed but psychotocism was not. Orthogonality was supported: correlations between psychotocism and extroversion/ introversion (rho = -0.02; n = 50; NS), neuroticism and psychotocism (rho = 0.22; n = 50; NS) and extroversion/ introversion and neuroticism (rho = -0.14; n =...

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