"Innovations that are perceived by individuals as having greater relative advantage, compatibility, trialability, and observability and less complexity will be adopted more rapidly than other innovations. Past research indicates that these five qualities are the most important characteristics of innovations in explaining the rate of adoption"

— E. M. Rogers in Diffusion of Innovations —Fifth Edition

"All innovation carry some degree of uncertainty for an individual, who is typically unsure of the new idea's functioning and thus seeks social reinforcement from others of his or her attitude toward the innovation. The individual wants to know wether his or her  thinking is on the right track in the opinion of peers"

— E. M. Rogers in Diffusion of Innovations (Fifth Edition)