ABSTRACT
This chapter examines the concept of personality, reviewing the salient historical aspects and dominant taxonomies of personality traits. It examines the salient taxonomies or systems of personality traits, which have dominated the field for decades. The chapter provides an overview of the major issues in personality research, its history, and its assessment. It debates Eysenck's biological theory of personality comprised three main dimensions: Neuroticism, Extraversion, and Psychoticism, and is still used in differential research, although the biological aspects of the theory seem out of date and the conceptualization of Psychoticism. The chapter identifies the main dimensions in which people differ or can be compared, and tests that these dimensions remain relatively stable over time. It explains the etiological basis of these universal and stable differences among individuals. The chapter focuses on the psychometric evidence for the relationship between intellectual competence and the Big Five personality traits, although other relevant traits.
