- Lewis Goldberg, he developed the theory and nicknamed it as the ‘big five’ or OCEAN
- openness to experience (open to new ideas vs traditional and oriented towards routine)
- conscientiousness (dutiful, organized, and orderly vs laidback, spontaneous, and unreliable)
- extraversion (outgoing and stimulation oriented vs quiet and stimulation avoiding)
- agreeableness (affable, friendly, conciliatory vs aggressive, dominant, disagreeable)
- neuroticism (emotional reactive, prone to negative emotion vs calm, imperturbable, optimistic)