Tagger Evaluation Given Hierarchical Tag Sets

Details Tagger Evaluation Given Hierarchical Tag Sets Tagger Evaluation Given Hierarchical Tag Sets

2000-08-10

arxiv.org/abs/cs/0008007v1

Computers and the Humanities 34(1-2). Special issue on SENSEVAL. pp. 79-84

Computer Science

Computation and Language

preprint is 7 pages, laid out differently than printed version

Scientific paper

We present methods for evaluating human and automatic taggers that extend current practice in three ways. First, we show how to evaluate taggers that assign multiple tags to each test instance, even if they do not assign probabilities. Second, we show how to accommodate a common property of manually constructed ``gold standards'' that are typically used for objective evaluation, namely that there is often more than one correct answer. Third, we show how to measure performance when the set of possible tags is tree-structured in an IS-A hierarchy. To illustrate how our methods can be used to measure inter-annotator agreement, we show how to compute the kappa coefficient over hierarchical tag sets.

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