Felix Flentge, Daniel Polani and Thomas Uthmann (2001)
Modelling the Emergence of Possession Norms using Memes
Journal of Artificial Societies and Social Simulation
vol. 4, no. 4
<http://www.soc.surrey.ac.uk/JASSS/4/4/3.html>
To cite articles published in the Journal of Artificial Societies and Social Simulation, please reference the above information and include paragraph numbers if necessary
Received: 30-Mar-01 Accepted: 30-Sep-01 Published: 31-Oct-01
Figure 1: Structure of a simulation step |
Sugarscape Growback Rule Gα In each simulation step, the sugar content of a cell grows by α units until it reaches the maximum sugar capacity of the cell. α is an integer. |
Figure 2: The sugarscape landscape. The size of the dots is proportional to the sugar capacity of the cells. |
Agent Movement Rule M
|
Agent Sex Rule S
|
Cultural Transmission Rule K
|
Movement Rule MS
|
Figure 3: The portion of agents with the movement gene. Agents with the gene perform rule MS, others rule M. Rules S and G1 are active, vision range and metabolism range from one to four. |
Cultural Transmission Rule K+
|
parameter | range | meaning | |
initial sugar level | 50-100 | the amount of sugar the agents of the first generation get at birth; the following generations inherit their initial sugar from their parents | |
maximum age | 60-100 | the maximum number of simulation steps an agent lives; he may starve earlier if he does not collect enough sugar; children inherit the maximum age from one of their parents | |
male fertility start | 12-15 | the number of the simulation steps when the male/female fertility starts/ends; children inherit the fertility range from the parent with the same sex | |
male fertility end | 50- 60 | ||
female fertility start | 12-15 | ||
female fertility end | 40-50 | ||
number of memes | 11 | the number of memes influence the probability for each single meme to be changed through cultural transmission; in our model only two memes have a special meaning |
Figure 4: Frequency of survival without possession meme. The figure shows that number of the runs in which the agent population survived 2000 steps versus different metabolism rates and vision ranges |
Figure 5: Frequency of survival with possession meme |
Figure 6: Average number of agents in simulation runs with (poss.) and without (no poss.) meme and different vision ranges |
Figure 7: Frequency of survival with active possession meme in 50% of the initial agent population |
Figure 8: Population growth without possession meme, a metabolism of four and a vision range of six |
Figure 9: Total population size (higher curve) and number of agents with possession meme (lower curve), metabolism four and vision range six |
Figure 10: Frequency of survival with 50% possession meme, 100% sanction meme and a punishment of four |
Figure 11: Frequency of survival with metabolism six, vision range reaches from two to ten, 50% possession meme, 100% sanction meme and various punishments |
Figure 12: Frequency of survival with 50% possession meme, 50% sanction meme, punishment twelve and costs of four |
Figure 13: Percentage of the possession meme and the sanction meme with costs four, metabolism four, and a vision range of six |
Figure 14: Average time until the possession meme disappears with metabolism two and 50% possession meme at the beginning of the run |
Figure 15: Frequency of survival without cultural transmission with 50% possession meme, 100% sanction meme and a punishment of four |
Figure 16: Frequency of survival without cultural transmission with 50% possession meme, 50% sanction meme, punishment twelve and costs of four |
Executables (Win 95/98/NT), source code (Borland Delphi 4) and tables of all our experiments are accessible via <http://www.Informatik.Uni-Mainz.DE/~flentge/norm-sim_eng.html>
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