What’s your type? The four personality traits

Average

High in neuroticism and extroversion. However, score low in openness. A high proportion of all adults fall into this category.

Reserved

Emotionally stable, but not open or neurotic. They are not particularly extrovert but are somewhat agreeable and conscientious.

Role Models

Score low in neuroticism and high in all the other traits. The likelihood that someone is a role model increases dramatically with age.

Self-centred

Very high in extroversion and below average in openness, agreeableness and conscientiousness. “People you don’t want to hang out with,” said the authors.