5. A modification of Maslow 's need
hierarchy was proposed by Clayton
Alderfer.Alderfer's propose to three
categories of human needs .
* EXISTENCE
* RELATEDNESS
* GROWTH
11. • Maslow's theory suggests a rigid
hierarchy of needs. But In ERG
theory more than one need may be
operative at the same time
•Maslow's states that a person will
stay at certain level until that need is
satisfied . ERG theory states that an
individual's desire to increase a
lower level need arises when a
higher level need is frustrating.