Abstract
Summary: This research studies the factor structure of the Karolinska Scales of Personality (KSP) and its location within Eysenck's three broad dimensions of personality: psychoticism, extraversion, and neuroticism. A series of factor analyses and structural equations with the KSP and the Eysenck Personality Questionnaire-Revised (EPQ-R) scales were carried out. The relationships between KSP and other biologically rooted personality traits (Zuckerman's sensation seeking and Gray's sensitivity to punishment) were also investigated. The results showed four underlying traits of the KSP: negative emotionality, aggressive nonconformity, impulsive unsocialized sensation seeking, and social withdrawal. Negative emotionality was mainly related to neuroticism; aggressive nonconformity was associated with psychoticism and, to a lesser degree, with neuroticism; impulsive unsocialized sensation seeking was correlated with both psychoticism and extraversion; and social withdrawal was principally related to low extraversion.
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