Definition: ERG Theory is a theory of human needs and motivation by Clayton P. Alderfer, in which he distinguishes three categories of human needs that influence worker's behavior:
- Existence needs (physiological and safety needs)
- Relatedness needs (involvement with family, friends, co-workers and employers)
- Growth needs (the desire to be creative, productive and to complete meaningful tasks).
Contrary to Maslow's Hierarchy of Needs, Alderfer stresses human needs are simultaneous.
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