Clayton Alderfer

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Clayton Paul Alderfer (born September 1, 1940) is an American psychologist, and consultant, known for further developing Maslow's hierarchy of needs.


Born in Sellersville, Pennsylvania, Alderfer obtained his BA in psychology in 1962 at Yale University, where he also obtained his PhD in psychology 1966. In 1977 he also obtained a degree by the American Board of Professional Psychology (ABPP).

After graduation Alderfer started his academic career at the University of Cornwell in 1966. In 1968 he returned to Yale, where he was researcher, lecturer and program director until 1992. In 1992 he moved to Rutgers University, where he acted as program director for another 12 years. In the new millennium he started his own consultancy firm.[1]


Alderfer further developed Maslow's hierarchy of needs by categorizing the hierarchy into his ERG theory (Existence, Relatedness and Growth). [2]

Selected publications[edit]

  • Alderfer, Clayton P., An Empirical Test of a New Theory of Human Needs; Organizational Behaviour and Human Performance, volume 4, issue 2, pp. 142–175, May 1969
  • Alderfer, C. P., Existence, Relatedness, and Growth; Human Needs in Organizational Settings, New York: Free Press, 1972
  • Alderfer, C. P., "A critique of Salancik and Pfeffer's examination of need-satisfaction theories, Administrative Science Quarterly, 22 (1977), 658-669
  • Alderfer, C. P. The Methodology of Organizational Diagnosis, Professional Psychology, 1980, 11, 459-468.
  • Alderfer, C. P. An Intergroup Perspective on Group Dynamics. In J. W. Lorsch (editor), Handbook of Organizational Behavior, 1987, 190-222.
  • Alderfer, C. P. Consulting to Underbounded Systems, C. P. Alderfer and C. L. Cooper (editors), Advances in Experiential Social Processes, 1980, 2, 267-295.
  • Alderfer, C. P. Improving organizational communication through long-term intergroup intervention, Journal of Applied Behavioral Science, 1977, 13, 193-210.
  • Alderfer, C. P. and Brown, L. D. Learning from changing, 47-56,129-141.
  • Alderfer, C.P. (2005). The Five Laws of Group and Intergroup Dynamics.


  1. ^ Clayton Alderfer at Accessed 02.03.2015.
  2. ^ Design in the Manufacturing Firm syllabus University of Washington Industrial Engineering course syllabus. Retrieved on 07-17-2011.

External links[edit]