Schachter' s theory of emotion, see 2 factors theory of emotion The two-factor theory (also known as Herzberg's motivation-hygiene theory and dual-factor theory ) states that there are certain factors in the work & places that cause satisfaction in the job while a separate set of factors cause dissatisfaction , all of which act independently to each other. It was developed by psychologist Frederick Herzberg . In 1959, Frederick Herzberg, a behavioral scientist proposed two-factor theory or the motivator-hygiene theory. According to Herzberg, there are some job factor that result in satisfaction while there are other job factors that prevent dissatisfactions. According to Herzberg, the opposite of “Satisfaction” is “No satisfactions” and the opposite of “Dissatisfactions” is “No Dissatisfactiosn”. Herzberg classified these job factors into two categories- Hygiene factor - Hygiene factors are those job factors which are essential for existence of motivation at workpl