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NETLOGO MOD SOFTWARE
If you mention this model or the NetLogo software in a publication, we ask that you include the citations below. Diving into Complexity: Developing Probabilistic Decentralized Thinking through Role-Playing Activities. This model is based on the work of the pioneering economist Thomas Schelling: Setting up the groups in this manner allows for easy movement from group to group.
NETLOGO MOD MOD
Notice the use of the mod primitive to space out the groups evenly. Thus, the world topology is a "vertical cylinder". Horizontal wrapping is enabled, but vertical wrapping is disabled. This simplifies the math for situating the groups. Most NetLogo models put the origin (0,0) in the center of the world, but here, we have placed the origin near the right edge of the world and most of the patches have negative X coordinates. Set a maximum group size, so that if there are too many people in the group, they become unhappy. (You might use NetLogo's breeds feature to implement that.)Īllow each breed of person to have their own tolerance.Ĭomplicate the tolerance rules: For example, the tolerance could go up as long as there are at least two of one breed.Īllow groups to subdivide, instead of finding new groups. Instead of male/female, try a trait that has more than two types, like race or religion. Is this model descriptive of real social settings? What tolerance level do real people typically have? EXTENDING THE MODELĪdd more attributes to the model. Is it possible to have an initial grouping such that the party never reaches a stable state? (i.e. Watch how one unhappy person can disrupt the stability of other groups. Using the GO ONCE button, experiment with different tolerances.
See how many mixed groups (not a single-sex group) you can get. Is there a critical tolerance at which each all groups end up being single-sex? At different tolerance levels, does it take longer or shorter for everyone to become comfortable? Are there more than at the start? THINGS TO TRY THINGS TO NOTICEĪt the end of the simulation (when everyone is happy), notice the number of single-sex groups. SINGLE SEX GROUPS shows the number groups containing only men or only women.
NUMBER HAPPY is how many party-goers are happy (that is, comfortable). The NUMBER HAPPY and SINGLE SEX GROUPS plots and monitors show how the party changes over time. If the TOLERANCE slider is set to 75, then each person will tolerate being in a group with less than or equal to 75% people of the opposite sex. You can move the slider while the model is running. To set the tolerance of the people for the opposite sex, use the TOLERANCE slider. White numbers are mixed groups and gray numbers are single-sex groups.
The numbers in the view show the sizes of the groups. The GO button keeps the model running until everybody is comfortable. To advance the model one step at a time, use the GO ONCE button. The NUMBER slider controls how many people are in the party, and the NUM-GROUPS slider controls how many groups form. Movement continues until everyone at the party is "comfortable" with their group. If they are in a group that has a higher percentage of people of the opposite sex than their TOLERANCE allows, then they are considered "uncomfortable", and they leave that group to find another group. The party-goers have a TOLERANCE that defines their comfort level with a group that has members of the opposite sex. A party-goer becomes uncomfortable and switches groups if their current group has too many members of the opposite sex. The men and women at the party form groups.
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