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1.
THE EMERGENCE OF COLLECTIVE MEMORIES
Sungmin Lee 李圣民 (Umeå University 于默奥⼤大学, 瑞典)
Verónica Ramenzoni (MPI Psycholinguistics Nijmegen, Holland)
Petter Holme 郝培德 (Umeå University 于默奥⼤大学, 瑞典,
Sungkyunguan University 成韵馆⼤大学,韩国)
PLoS ONE 5, e12522 (2010).
http://www.tp.umu.se/~holme/
全国复杂⺴⽹网络学术会议
October 17, 2010
2.
培德在苏州
complex network
boom of early 00’s
Narrative network 叙述⺴⽹网络
≈ Memory web 记忆⺴⽹网络
research leader
fieldtrip to 北京
3.
Outline
- What is the topology of real narrative networks?
- How can we model the evolution of narrative
networks / memory webs?
- How (much) can communication stabilize
collective memories?
- What are the conditions for groups to form?
- How does the observations behave as a function
of population size?
4.
Empirical memory web
Source material
Bearman, Moody, Faris, 2003. “Networks and History” Complexity 8:61–71.
5.
Empirical memory web
Individual memory web 1
Bearman, Moody, Faris, 2003. “Networks and History” Complexity 8:61–71.
6.
Empirical memory web
Individual memory web 2
Bearman, Moody, Faris, 2003. “Networks and History” Complexity 8:61–71.
7.
Empirical memory web
Aggregate memory web
Bearman, Moody, Faris, 2003. “Networks and History” Complexity 8:61–71.
12.
Model ingredients
- N agents with individual memory webs.
- Agents can learn about history from experience or
communication.
- Closer friends are more likely to communicate &
people who communicate often are closer friends.
- Events / associative arcs remembered more strongly
are more frequently discussed, and vice versa.
- Events / associative arcs not talked about are
gradually forgotten.
17.
Model community structure
Memories and social ties
18.
18
Model community structure
Size- & communication-rate scaling of the number of
communities
19.
Model community structure
Size-scaling of the diversity regime
20.
Model community structure
Size-scaling of the diversity regime
21.
Model community structure
Size-scaling of the number of groups
22.
Summary
- Narrative networks represent memory webs.
- Network modeling can be helpful to understand
these quantitatively.
- An empirical narrative network shows skewed (in-
and out-) degree distribution.
- Propose a communication model that shows the
emergence of collective memories
- … and the formation of communities with strong
internal connections and similar memory webs.
- The number of communities is limited as a function
of N