Core Methods in Educational Data Mining

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Core Methods in Educational Data Mining HUDK4050 Fall 2014.

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Core Methods in Educational Data Mining

Core Methods in Educational Data Mining

Core Methods in Educational Data Mining

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Core Methods in Educational Data Mining

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Core Methods in Educational Data Mining

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Presentation transcript:

Core Methods in Educational Data Mining HUDK4050 Fall 2014

Assignment 3B Any questions?

Textbook

Any questions about cross-validation?

What are the advantages and disadvantages? Flat CV Stratified CV

What are the advantages and disadvantages? Flat CV Student-Level CV

Validity

What is… Generalizability?

What is… Ecological Validity?

What is… Construct Validity?

What is… Predictive Validity?

What is… Substantive Validity?

What is… Conclusion Validity?

What are… Some other validity concerns?

Exercise In groups of 3 Write the abstract of the worst behavior detector paper ever

Any group want to share?

Exercise #2 In different groups of 3 Now write the abstract of the best behavior detector paper ever

Any group want to share?

How many of these were actually feasible?

Real-world EDM involves tradeoffs

Real-world EDM involves tradeoffs Which types of validity do you want to optimize? Which types of validity do you want to satisfice? Can any be safely ignored completely? (at least in some cases)

Other comments or questions About validity issues?

Other questions, comments, concerns about textbook?

Next Class Wednesday, October 15 B3: Bayesian Knowledge Tracing Baker, R.S. (2014) Big Data and Education. Ch. 4, V1, V2. Corbett, A.T., Anderson, J.R. (1995) Knowledge Tracing: Modeling the Acquisition of Procedural Knowledge. User Modeling and User-Adapted Interaction, 4, 253-278.

The End