The Big Five Model of Personality is also referred to as the Five-Factor Model or the Big Five Personality traits. The Big Five personality traits model is based on the work of Robert McCrae and Paul Costa and the NEO-PI-R assessment which uses Likert scale self-reports to assess personality traits. The five super traits described in the Big Five Model is Openness to Experience (Closed to Experiences), Conscientiousness (Lack of Conscientiousness), Extraversion (Introversion), Agreeableness (Disagreeableness) and Neuroticism (Emotional Stability).