Expansion diffusion - Innovations spread to new places while staying strong in their original locations, Relocation diffusion - spread of cultural traits from a cultural hearth through human migration, Hierarchical diffusion - when idea spreads by passing first among the most connected individuals, then spreading to other individuals , Contagious diffusion - the process through which ideas are rapidly spread  through a population, Stimulus diffusion - diffusion in which a group of people receive a cultural element from another but gives it a new and unique form ,

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