•;•:•• A key premise of the Diffusion of Innovations model is that some innovations diffuse
• . quickly and widely (like the Internet), whereas others are "".eakly o_r never adopted,
• and others are adopted but subsequently abandoned. Also, mnovations are adopted by different individuals and spread at different rates in subgroups of individuals. Three groups of variables have been used to explain these different outcomes: (1) charac teristics of the innovation, (2) characteristics of adopters, and (3) features of the set- ting or environmental context.