生产车间5s管理制度.docx

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Dynamic Systems plexity Theory and Second Language Development
Theoretical issues
Kees de Bot
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Structure of presentation
1. Basics of Dynamic Systems
2. Application in research on Second Language Development
3. Theoretical/psycholinguistic implications
4. How can we do research using DST principles
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Systems are sets of interacting variables
. ecosystems, governments, stock markets, traffic in Xian,
EFL classrooms
SLD as dynamic process
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Characteristics plex systems
Change over time
Consisting of many ponents
Dependent on initial conditions
Interconnected
Unpredictable (to a certain extent)
Dependent on resources
Constantly changing
Show stable and less stable stages
anizing
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DST as branch of mathematics
Theoretical models to plex interactions, such as the movement of the moon under the influence of the sun, the earth: the ‘three bodies problem’
Aimed at development plex systems
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The chaos factor
The inherent unpredictability plex systems: non-linearity and interaction of variables: chaos as possible e of development
Chaos is unpredictability, not lack of order
Development through iterations
Dynamic systems and SLA
7
Development over time: iterations of simple equations/procedures
Equations to describe change over time:
Logistic mapping iterations:
x (n+1) = r xn ( 1 - xn )
- Bifurcation plot
Can be seen