The Dispositional Theory suggests that people have innate dispositions that cause them to have tendencies toward a certain level of job satisfaction regardless of their job. A significant model that narrowed this theory was the Core Self-Evaluations Model which argues that four traits - self-esteem, self-efficacy, locus of control, and neuroticism - determine one's disposition. Herzberg's Two-Factor Theory also attempts to explain job satisfaction and proposes that satisfaction and dissatisfaction are driven by different factors - motivators like achievement and hygiene factors like company policies.