The five factor model of personality and intelligence: A twin study on the relationship between the two constructs

► IQ is positively correlated with agreeableness and openness to experience. ► IQ is negatively correlated with neuroticism. ► Genetic factors explain nearly half of these associations. ► Genetic correlations were 0.3-0.4 between IQ with agreeableness and openness. ► Genetic correlations were −0.18 between IQ with neuroticism.