Clayton Paul Alderfer (September 1, 1940 - October 30, 2015) was an American psychologist and consultant known for developing Abraham Maslow's hierarchy of needs into a framework of three essential categories: existence, relatedness, and growth. == Biography == Born in Sellersville, Pennsylvania, Alderfer obtained his BA in psychology in 1962 at Yale University, where he also obtained his PhD in psychology 1966.
Clayton Paul Alderfer (September 1, 1940 - October 30, 2015) was an American psychologist and consultant known for developing Abraham Maslow's hierarchy of needs into a framework of three essential categories: existence, relatedness, and growth. == Biography == Born in Sellersville, Pennsylvania, Alderfer obtained his BA in psychology in 1962 at Yale University, where he also obtained his PhD in psychology 1966.
Source: Wikipedia "Clayton Alderfer" · CC BY-SA 4.0
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