ABSTRACT
This chapter discusses the results of the most robust studies on the relationship between personality and psychometric intelligence. Before examining the salient empirical evidence on the relationship between personality traits and psychometric intelligence, the chapter focuses on some of the existent theoretical frameworks to conceptualize the link between personality and ability variables - namely, cerebral arousability and top-down approaches. Conceptualizing both latent and psychometric intelligence is largely beneficial to understand the apparent equivocal body of correlational evidence for the relationship between noncognitive and cognitive traits. The chapter examines two types of evidence -one that refers to the possible impact of personality traits on IQ or ability test performance, and one that refers to the long-term effects of personality traits on actual intellectual competence. It also examines several examples of how the personality traits: Neuroticism and Extraversion, may affect a person's performance on an intelligence test and how specific methodological issues may result in associations between Extraversion/Introversion and psychometric intelligence.
