2 Personality Traits That Indicate High IntelligenceIntroverts who have more stable personalities have higher levels of general knowledge, research finds. These two personality factors, along with being open to experience, predict people’s general knowledge. General knowledge — or as psychologists call it, crystallised intelligence — is one of two broad aspects of intelligence. General knowledge is often linked to success in life because innate talent is not enough — application matters. The other type is called ‘fluid intelligence’, and refers to abstract reasoning and the speed at which the brain works. The conclusions come from a survey of 201 university students in the UK. All were given tests of the five major aspects of personality: neuroticism, extraversion, openness to experience, agreeableness and conscientiousness.