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Maximilian Stauss:

Evaluation of Mixed Initiative Concept Annotation

Discipline
Semantic Technologies, Information Extraction
Degree
Master of Science (M.Sc.)

Contents

Context

Semantic Annotation of text snippets is subject to a major challenge called "Word Sense Disambiguation" (1). One way to mitigate this problem is to employ crowd-worker to annotate text. This approach changes the focus from information extraction metrics (namely precision and recall (2)) towards multi-step quality metrics. Examples are: The time needed to annotate a text, the recommended concepts for the annotation, the click-effort needed by the workers to validate a concept, the average quality of annotations by crowd-workers.

Problem

In classic information extraction, quality metrics are well defined and tested. Introducing a interactive component into the pipeline calls for new ways of validation of changes introduced into different parts of the pipeline, to better reason about algorithmic and design choices. Using the application case of Interactive Concept Validation (3) this work proposes possible improvements, metrics for different steps and a experimental validation of the impact of the implementation of selected features.

Procedure

  • Analyze the existing ICV as an example for a mixed initiative information extraction pipeline
  • Propose enhancements
  • Collect metrics for the enhancements:
    • Operationalization of human effort
    • Measurable tradeoff: Quality/Time spent/Costs
  • Conduct crowd-sourcing to validate the impact of the features

References

Warncke-Wang, M., Cosley, D., & Riedl, J. (2013). Tell Me More: An Actionable Quality Model for Wikipedia. Presented at the WikiSym '13:Proceedings of the Ninth Annual International Symposium on Wikis and Open Collaboration.