This type of diffusion also can occur when an innovation is adopted by the highest levels of a cultural group and spread down through the lowest levels of a cultural group. My favorite example of this is when a movie star wears a certain kind of clothing or hairdo. Within months, other people across the country have adopted the clothing style or hairdo. The processes of diffusion face barriers during the spatial diffusion of an innovation. Physical barriers include mountain ranges, oceans, and the type of weather in a region or area.
Cultural barriers keep an innovation from being adopted for language, social, or religious reasons.
In some culture groups, no matter how resistant to change, some people will try anything new. In some culture groups, no matter how accepting of change, some people will not accept an idea until everyone else has accepted the innovation. These are psychological barriers. Lastly, but when discussing the diffusion of sports, not least is economic barriers to change. Some cultures will not accept change if the culture cannot afford the cost of the change.