That said, a study by the Gallup Organization, as detailed in the book First, Break All the Rules: What the World's Greatest Managers Do by Marcus Buckingham and Curt Coffman, appears to provide strong support for Herzberg's division of satisfaction and dissatisfaction onto two separate scales.
The Big Bang Theory | The O'Reilly Factor | The X Factor (UK) | Microphthalmia-associated transcription factor | The X Factor | Fear Factor | Theory of a Deadman | music theory | Max Factor | probability theory | theory | The X Factor (TV series) | Theory of relativity | B-cell activating factor | theory of relativity | Social learning theory | Game Theory (band) | Game Theory | Epidermal growth factor receptor | Conspiracy theory | Music theory | K-theory | AP Music Theory | Psi Factor: Chronicles of the Paranormal | Piaget's theory of cognitive development | conspiracy theory | Astro Boy: Omega Factor | Theory of Relativity | Theory | Terror management theory |
These stem originally from Louis Kelso & Patricia Hetter Kelso (1967)Two-Factor Theory: The Economics of Reality; the founding of Kelso & Company in 1970; and then from conversations in the early 1970s between Louis Kelso, Norman Kurland (Center for Economic and Social Justice), Senator Russell Long of Louisiana (Chairman, USA Senate Finance Committee, 1966 - 1981) and Senator Mike Gravel of Alaska.