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Everett M. Rogers (March 6, 1931 – October 21, 2004) was a communication scholar, sociologist, writer, and teacher. He is best known for originating the ''diffusion of innovations'' theory and for introducing the term ''early adopter''. Rogers was born on his family's Pinehurst Farm in Carroll, Iowa, in 1931. His father loved electromechanical farm innovations, but was highly reluctant to utilize biological–chemical innovations, so he resisted adopting the new hybrid seed corn, even though it yielded 25% more crop and was resistant to drought. During the Iowa drought of 1936, while the hybrid seed corn stood tall on the neighbor’s farm, the crop on the Rogers’ farm wilted. Rogers’ father was finally convinced. Rogers had no plans to attend university until a school teacher drove him and some classmates to Ames to visit Iowa State University. Rogers decided to pursue a degree in agriculture there. He then served in the Korean War for two years. He returned to Iowa State University to earn a Ph.D. in sociology and statistics in 1957. ==Diffusion of innovations== When the first edition (1962) of Diffusion of Innovations was published, Rogers was an assistant professor of rural sociology at Ohio State University. He was only 30 years old but was becoming a world-renowned academic figure. In the mid-2000s, ''The Diffusion of Innovations'' became the second-most-cited book in the social sciences. (Arvind Singhal: ''Introducing Professor Everett M. Rogers, 47th Annual Research Lecturer, University of New Mexico'') (). The fifth edition (2003, with Nancy Singer Olaguera) addresses the spread of the Internet, and how it has transformed the way human beings communicate and adopt new ideas. Rogers proposes that adopters of any new innovation or idea can be categorized as innovators (2.5%), early adopters (13.5%), early majority (34%), late majority (34%) and laggards (16%), based on the mathematically based Bell curve. These categories, based on standard deviations from the mean of the normal curve, provide a common language for innovation researchers. Each adopter's willingness and ability to adopt an innovation depends on their awareness, interest, evaluation, trial, and adoption. People can fall into different categories for different innovations—a farmer might be an early adopter of mechanical innovations, but a late majority adopter of biological innovations or VCRs. When graphed, the rate of adoption formed what came to typify the Diffusion of Innovations model, an “s-shaped curve.” (S curve) The graph essentially shows a cumulative percentage of adopters over time – slow at the start, more rapid as adoption increases, then leveling off until only a small percentage of laggards have not adopted. (Diffusion of Innovations 1983 ) His research and work became widely accepted in communications and technology adoption studies, and also found its way into a variety of other social science studies. Rogers was also able to relate his communications research to practical health problems, including hygiene, family planning, cancer prevention, and drunk driving. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Everett Rogers」の詳細全文を読む スポンサード リンク
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