Douglas McGregor proposed Theory X and Theory Y
Frederick Herzberg believed that the two aspects to the work environment are hygine and motivation.
Hygiene factors are Policies, Adminstration, Working conditions, Salary, Status, Supervision, Security.
Motivation factors are Achievement, Recognition, Growth, Advancement, Interest in the job, Job challenge.
Maslow's Hierarchy of needs
Physiological, Safety/security, Social, Esteem, Self Actualization
ERG Theory : Existence, Relatedness, Growth
McClelland's theory of needs:
Power, Achievement, Affiliation
Vroom's Expectancy theory
Effort -> Job performance -> Rewards