The document discusses several models of the adoption process for innovations. It describes Ryan and Gross's (1943) model which identified 4 stages: awareness, conviction, acceptance, and adoption. Wilkening (1953) identified 4 stages: obtaining information, conviction, trial, and adoption. The Central Rural Sociology Subcommittee (1955) identified 5 widely adopted stages: awareness, interest, evaluation, trial, and adoption (or rejection). The document provides examples of what occurs at each stage and concludes with a discussion of limitations of the stage models and an alternative 7-stage model by Singh and Pareek (1965).