Herzberg's Motivation-Hygiene Theory (Two Factor Theory)

Two Factor Theory distinguishes between:

• Motivators (e.g. challenging work, recognition, responsibility) which give positive satisfaction, arising from intrinsic conditions of the job itself, such as recognition, achievement, or personal growth
• Hygiene factors (e.g. status, job security, salary and fringe benefits) which do not give positive satisfaction, although dissatisfaction results from their absence. These are extrinsic to the work itself, and include aspects such as company policies, supervisory practices, or wages/salary
  

http://en.wikipedia.org/wiki/Two_factor_theory