The five factors of the Big Five are openness, conscientiousness, extroversion, neuroticism and:

1. The Big Five is a fixed list of five trait dimensions. 2. The five factors are openness to experience, conscientiousness and extroversion. 3. The list continues with agreeableness and neuroticism. 4. Assertiveness is a facet of extroversion rather than a factor of its own. 5. Inferiority and congruence come from Adler and Rogers respectively. _Source: OpenStax Psychology 2e (CC BY 4.0), Ch 11 'Personality', sections 11.1-11.9_