DIFFUSION OF INNOVATION AND ADVERTISING MESSAGE
DIFFUSION OF INNOVATION The diffusion of innovation refers to the tendency of new products, practices, or ideas to spread among people. Usually, when new products or ideas come about, they are only adopted by a small group of people initially; later, many innovations spread to other people. The bell shaped curve frequently illustrates the rate of adoption of a new product. Cumulative adoptions are reflected by the S-shaped curve. The saturation point is the maximum proportion of consumers likely to adopt a product. In the case of refrigerators in the U.S., the saturation level is nearly one hundred percent of households; it well below that for video games that, even when spread out to a large part of the population, will be of interest to far from everyone. Several specific product categories have case histories that illustrate important issues in adoption. ATM cards spread relatively quickly. Since the cards were used in public, others who did not yet hold the cards could see how conv...