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Emergence 2009: Final Projects, I
Biology 361 = Computer Science 361
Bryn Mawr College, Spring 2009
Download/view: tippingpoint1.nlogo
WHAT IS IT? |
This model simulates how a trend spreads according to Malcolm Gladwell's 2000 book The Tipping Point, a book examining why change happens as quickly and unpredictably as it often does. More specifically, the book analyzes how trends emerge and spread. In The Tipping Point, Gladwell describes three types of individuals who aid in the spread of a trend. He names these individuals connectors, mavens, and salesmen.
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HOW IT WORKS |
In the model, there is a general population with one person who initially possesses the message or idea (the initiator). A person in possession of the message is green, while one who does not possess the message is red. For a person of the general population to acquire the message (to turn from red to green), it must come into contact with a green turtle three times. |
HOW TO USE IT |
The sliders allow one to adjust the initial number of each type of individual. Once satisfied with the initial number of each type of person, the setup-tippingpoint button can be pressed. To run the simulation, one should press go-tippingpoint. In order to observe how fast the trend was spread, there is a graph that plots what percentage of all turtles are green. Underneath the graph there is a display of the percentage of all turtles that are green. Next to that display is another that shows how long it took for all turtles to turn to green. The show initiator button allows one to observe where the initiator turtle is at anytime. The add-barrier button adds a barrier in the world that turtles cannot cross. |
THINGS TO TRY |
Run the simulation a number of times with different combinations of connectors, mavens, and salesmen. Compare how long it takes for the trend to spread for each different combination. The results are often counterintuitive. |
EXTENDING THE MODEL |
The behavior of each type of individual can be changed in the procedures section. For example, the mavens can affect other turtles in a larger radius or more turtles can flock to connectors within a larger radius. Doing these things will change the speed of the spread of the trend. |
CREDITS AND REFERENCES |
Gladwell, Malcolm. The Tipping Point How Little Things Can Make a Big Difference. Boston: Little, Brown and Company, 2000. Paul Grobstein Evan Raskin The rest of my Emergence class at Bryn Mawr College |
Models created using NetLogo.
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