Ap HUgG

Relocation Diffusion

The spread of an idea or trait through the physical movement of people from one place to another

Expansion Diffusion

The spread of an idea or trait outward from a hearth in a way that the number of adopters keeps growing, while the trait remains strong at the original source.

Contagious Diffusion

The rapid, widespread, person-to-person spread of a trait through a population, based entirely on proximity and direct contact (like a wave or a virus). It does not follow a formal rank or hierarchy.

Hierarchical Diffusion

The spread of a trait from places or people of power, prestige, or connectivity down to lesser-connected places or individuals (a "top-down" approach).