@inproceedings{Moll'a:2003b, abstract = {A wide range of parser and/or grammar evaluation methods have been reported in the literature. However, in most cases these evaluations take the parsers independently (intrinsic evaluations), and only in a few cases has the effect of different parsers in real applications been measured (extrinsic evaluations). This paper compares two evaluations of the Link Grammar parser and the Conexor Functional Dependency Grammar parser. The parsing systems, despite both being dependency-based, return different types of dependencies, making a direct comparison impossible. In the intrinsic evaluation, the accuracy of the parsers is compared independently by converting the dependencies into grammatical relations and using the methodology of \newcite{Carroll:1998} for parser comparison. In the extrinsic evaluation, the parsers' impact in a practical application is compared within the context of answer extraction. The differences in the results are significant.}, added-at = {2008-01-29T08:19:28.000+0100}, address = {Budapest}, author = {Moll{\'a}, Diego and Hutchinson, Ben}, biburl = {http://www.bibsonomy.org/bibtex/2a9ae1ef031141fe460eaa6deea6036d7/diego_ma}, booktitle = {Proc. European Association for Computational Linguistics (EACL), workshop on Evaluation Initiatives in Natural Language Processing}, interhash = {c39636076c0c039471b07265565ed060}, intrahash = {a9ae1ef031141fe460eaa6deea6036d7}, keywords = {parsers evaluation AnswerFinder gram_rels molla_publication}, month = {April}, organization = {Association for Computational Linguistics}, pages = {43-50}, publisher = {ACL}, timestamp = {2008-01-29T08:19:28.000+0100}, title = {Intrinsic versus Extrinsic Evaluations of Parsing Systems}, year = 2003 } @unpublished{Molla:anlp02:preparation, abstract = {A wide variety of parser and/or grammar evaluation methods have been reported in the literature. However, in most cases these evaluations take the parsers independently (\emph{in vitro} evaluations), and only in a few cases has the effect of different parsers in real applications been measured (\emph{in vivo} evaluations). This paper compares two evaluations of the Link Grammar parser and the Conexor Functional Dependency Grammar parser. The parsing systems, despite both being dependency-based, return different types of dependencies, making a direct comparison impossible. In the first evaluation, the accuracy of the parsers is compared \emph{in vitro} by converting the dependencies into grammatical relations and using the methodology of \newcite{Carroll:1998} for parser comparison. In the second evaluation, the parsers' impact in a practical application is compared \emph{in vivo} within the context of answer extraction. The differences in the results are significant and raise questions on the usefulness of purely \emph{in vitro} evaluations.}, added-at = {2008-01-29T08:16:55.000+0100}, author = {Moll{\'a}, Diego and Hutchinson, Ben}, biburl = {http://www.bibsonomy.org/bibtex/2ddf167520fb423a651e0c5dcb062f1f2/diego_ma}, interhash = {bd10546650953340c50de023e6c7c51e}, intrahash = {ddf167520fb423a651e0c5dcb062f1f2}, keywords = {AnswerFinder parsers evaluation gram_rels molla_publication}, note = {In preparation}, timestamp = {2008-01-29T08:16:55.000+0100}, title = {In Vitro and In Vivo Evaluations of Parsing Systems Within the Context of Answer Extraction}, year = 2002 } @inproceedings{Carroll:1998, abstract = {We present a critical overview of the state-of-the-art in parser evaluation methodologies and metrics. A discussion of their relative strengths and weaknesses motivates a new --- and we claim more informative and generally applicable --- technique of measuring parser accuracy, based on the use of grammatical relations. We conclude with some preliminary results of experiments in which we use this new scheme to evaluate a robust parser of English.}, added-at = {2007-12-14T02:37:14.000+0100}, author = {Carroll, John and Briscoe, Ted and Sanfilippo, Antonio}, biburl = {http://www.bibsonomy.org/bibtex/280701520a4cf08fce650cb67143bbf34/diego_ma}, booktitle = {Proc. LREC98}, interhash = {c8231de304d4ab362ed91cfb53fa3727}, intrahash = {80701520a4cf08fce650cb67143bbf34}, keywords = {parsers evaluation gram_rels}, timestamp = {2007-12-14T02:37:14.000+0100}, title = {Parser Evaluation: a Survey and a New Proposal}, url = {http://citeseer.nj.nec.com/carroll98parser.html}, year = 1998 }