Theories of Motivation By SPartee 1900 Instinct Theory William James 1938 Reinforcement Theory of Motivation B. F. Skinner 1943 Hierarchy of Needs Abraham Maslow 1956 Two-Factor Theory Frederick Herzberg 1958 Hawthorne Effect Henry A. Landsberger 1961 Acquired Needs Theory David McClelland 1969 ERG Theory Clayton Alderfer 1974 Three-Dimensional Theory of Attribution Bernard Weiner 1980 Expectancy Value Theory Jacquelynne Eccles 1985 Cognitive Evaluation Theory Edward L. Deci and Richard Ryan