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The role of models TOK presentation

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by

Yong Zhang

on 3 December 2014

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Transcript of The role of models TOK presentation

Real world example
In middle school
Perspective 1
Natural Science

What is a model?
Perspective 2
Human Science

Models and TOK
Link back to RWE
Application to the world beyond RWE
Knowledge question
To what extent can we use model as a valid representation of the knowledge in real world?
In high school
Economics
Version 2.0
The most basic vesion
money
money
input
goods & services
firms
households
Conclusions
=
Natural Geography
More abstract
More variables
More unpredictable
Sense perception
Language
One glance solves everything
The power of metaphor
Water
Flow
Imagination
If you can't see then imagine...
money
money
goods & services
input
leakage
tax
saving
export
injection
investment
government spending
import
Correspondence
Coherence
Pragmatic
Theoretical characteristic
Difficulties in conducting experiment
Significance
Evaluation: Two groups of people
Students
Economists
Just the gist
As profound as possible
Summary
Human activities and personalities, which are the subject in human science, are too complex to be pinned down and studied
A simplified version of reality
They are just what men think they are
The wrongs are still valuable
Definition
Representation (physical object, schematic illustration or worded description) of phenomena, objects or complex processes.
3. Some models, although simplified, are useful.

4. A"wrong" model can be the portal to another better model.
1. Models ≠ knowledge in reality

2. Models can be influenced by bias
The Globe
Students studying what the Earth is like as the teacher of the Natural Science showing them the Globe.
Allow Visualization:

how the earth looks,
how the continents are placed,
the size of the oceans, etc. (color of the continents and ocean)
Sense perception
Language
The names of countries, continents and seas,
which help in identification.
Natural Geography Class
Example
Correspondence
Coherence
Pragmatic
Evaluation: 2 groups of people
Students
Scientists
Useful to understand knowledge
Not true;
Not so useful to do investigation
Summary
Each model is a specific version of the real world and serves its own purpose. Generally the more detailed the model, the closer it is to reality
Two Statements
Suppose its 10:01 now


Evaluation
The test of utility makes the first model better than the other one even though it is not true.
Limitations: doesn't necessarily apply to all situations
Those who use models
The realization of the difference between models and reality
Make
proper
use of different different models
Those who make models
Be aware of
personal bias
limitation of simplification

The MONIAC
machine
Limitations
Correspondence test
Coherence test
Simplified, inaccurate, but still correspondent
Sometimes we can not know the truth, thus can not see whether the model is correspondent with it or not
Pragmatic test
Utility
validity

The model is based on Keynesian
The maker was a supporter of Keynesian
Confirmation bias
Incoherent with the Monetarists' belief
Coherent test
1. It is 10:00 a.m.
2. It is between 3:00 a.m. and 3:00 p.m.
Limitation
Not comprehensive enough
...and others (will be further discussed in 3 Tests of Truth later)
Full transcript