With respect, to methodology Rogers leaned on the practice adopted in, agricultural sociology which he knew from his own. Studies in this field at Iowa State University in particular, the seminal study by Iowa State sociologists Bryce Ryan and. Neal Gross (Ryan, & Gross 1943; CF. Lowery & DeFleur 1995; Meyer,,, 2004; Rogers 2003). In the summer of 1941 Ryan and,, Gross interviewed 259 farmers regarding their adoption of a new hybrid seed corn during the 1930s. Drawing on, these data. They identified factors that influence a single adoption decision and proposed an S-shaped diffusion curve.
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