Building a Large Annotated Corpus of English: The Penn Treebank

Marcus et al., 1993, Building a Large Annotated Corpus of English (Computational Linguistics)

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3 Two modes of annotation: an experiment

  1. What did the experiment comparing manual tagging with correcting automatic output find?
    Correcting was better on all counts: about twice as fast as tagging from scratch, with roughly half the inter-annotator disagreement, and higher accuracy against a benchmark.
  2. How did the experiment measure consistency versus accuracy?
    Consistency: inter-annotator disagreement rate (pairwise disagreements over words). Accuracy: disagreement with a carefully hand-corrected benchmark version of the texts, since consistency says nothing about validity.

Source

  • Mitchell P. Marcus, Beatrice Santorini and Mary Ann Marcinkiewicz. 1993. Building a Large Annotated Corpus of English: The Penn Treebank. In Computational Linguistics, pp. 313–330. https://aclanthology.org/J93-2004/