Geography: It’s Nature and Perspectives Thinking Geographically

Movement Diffusion

Cultural Diffusion Movements of people, goods, or ideas

Independent Invention Same cultural trait invented in two different places

Types of Diffusion

A. Expansion Diffusion IDEA moves- idea spreads from one place to another

A. Expansion Diffusion 1. Contagious Diffusion: nearly all adjacent individuals are affected

initial

A. Expansion Diffusion 2. Hierarchical Diffusion: main channel  of diffusion is some segment of those who are susceptible to or adopting whatever is being diffused

Airline Route Networks

Fashion https://www.youtube.com/watch?v=Yj8mHwvFxMc

Expansion diffusion 3. Stimulus Diffusion: when something is not readily adopted by a receiving population but later on as the result of some sort of stimulus, is adopted or is accepted by receiving population in a different use

Big Mac rejected, then accepted

Often with food

Chinese porcelain – introduced Desired, but cost was too expensive for it to catch on European manufactures copied process, making something similar Affordable, caught on

B. Relocation Diffusion PEOPLE move – the actual movement of individuals who have already adopted an idea or innovation and carry it to a new location where they proceed to disseminate it

language

religion

Space-Time Compression, 1492-1962 Fig. 1-20: The times required to cross the Atlantic, or orbit the earth, illustrate how transport improvements have shrunk the world.

AIDS Diffusion in the US, 1981-2002 Fig. 1-22: New AIDS cases were concentrated in three nodes in 1981. They spread through the country in the 1980s, but declined in the original nodes in the late 1990s.

New AIDS Cases, 1981 (per 100,000 population)

New AIDS Cases, 1993 (per 100,000 population)

New AIDS Cases, 2002 (per 100,000 population)

Cumulative AIDS Cases, 1981-2002

The AIDS Memorial Quilt