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PASCAL Challenges Workshop 2
Pascal

Combinatory Hybrid Elementary Analysis of Text

author: Eric Atwell, University of Leeds

Description

We propose to CHEAT approach to the MorphoChallenge contest: Combinatory Hybrid Elementary Analysis of Text. The idea is: acquire results from a number of other candidate systems; CHEAT will read in the output files of each of the other systems, and then line-by-line select the "majority vote" analysis - the analysis which most systems have gone for. If there is a tie, take the result produced by the system with the highest F-measure; if the other systems´ output files are ordered best-first, then this is achieved by simply taking the first of the tied results. To justify our approach, we need to show that this really is unsupervised learning, as defined on the MorphoChallenge website; arguably the CHEAT approach involves super-sized unsupervised learning, as it combines three different layers of unsupervised learning.

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Slides
0:00 Combinatory Hybrid Elementary Analysis of Text: the CHEAT approach to MorphoChallenge2005
1:29 With the help of Eric Atwell’s Computational Modelling MSc class…
2:02 Our guiding principle: get others to do the work
2:50 But is this really “unsupervised learning”?
3:20 Triple-layer Super-Sized Unsupervised Learning:
3:46 Unsupervised Learning by students
4:14 Unsupervised Learning by student programs
4:44 Unsupervised learning by cheat.py
5:15 cheat.py and cheat2.py
5:44 Results: cheating works!
6:33 F-measure with reference algorithms (1)
7:40 F-measure with reference algorithms (2)
8:02 F-measure with reference algorithms (3)
8:26 LER for reference algorithms
9:08 Note: The ROVER approach
9:39 Conclusions: Machine Learning and Student Learning
10:52 Thank you!
12:06 - Questions

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