created with NetLogo
view/download model file: DiffusionCompetition.nlogo
This is a model of contagion. There are white nodes that have no opinion, and they may adopt a red or a blue opinion. Once they have adopted the opinion, they do not change their minds.
The model starts with all nodes having no opinion.
There are two models of contagion.
In the SIMPLE SPREAD model an "infected" node will infect each of its opinion-free neighbors with probability PROB-INFECTION.
In the COMPLEX SPREAD model, each opinion-free node will adopt the opinion of its neigbhors only if at least 2 of its neighbors share that opinion. If there are multiple opinions in the neighborhood
Click on SELECT-RED and select the nodes you will seed with the red opinion. Then click on the same button again to stop selection. Do the same with SELECT-BLUE.
Then run the model, using either simple or complex contagion. You can slow things down by moving the speed slider up top.
Challenge a friend. Have them pick two red nodes, and you pick two blue nodes. Run one of the models. Whose opinion wins out?
This model was created by Lada Adamic 2007
Feel free to use it and modify it as you like with or without attribution.